diff --git a/.gitignore b/.gitignore
index 8ceeed3ce..16bb1d5af 100644
--- a/.gitignore
+++ b/.gitignore
@@ -2,40 +2,33 @@
 # sort with: sort -d -u
 .DS_Store
 /NOTES
-/archive/1984/
-/archive/1985/
-/archive/1986/
-/archive/1987/
-/archive/1988/
-/archive/1989/
-/archive/1990/
-/archive/1991/
-/archive/1992/
-/archive/1993/
-/archive/1994/
-/archive/1995/
-/archive/1996/
-/archive/1998/
-/archive/2000/
-/archive/2001/
-/archive/2004/
-/archive/2005/
-/archive/2006/
-/archive/2011/
-/archive/2012/
-/archive/2013/
-/archive/2014/
-/archive/2015/
-/archive/2018/
-/archive/2019/
-/archive/2020/
-*.bak
-/bin
-*.bku
-*.dSYM
-iocccsize
-mkentry
+/archive/historic/1984
+/archive/historic/1985
+/archive/historic/1986
+/archive/historic/1987
+/archive/historic/1988
+/archive/historic/1989
+/archive/historic/1990
+/archive/historic/1991
+/archive/historic/1992
+/archive/historic/1993
+/archive/historic/1994
+/archive/historic/1995
+/archive/historic/1996
+/archive/historic/1998
+/archive/historic/2000
+/archive/historic/2001
+/archive/historic/2004
+/archive/historic/2005
+/archive/historic/2006
+/archive/historic/2011
+/archive/historic/2012
+/archive/historic/2013
+/archive/historic/2014
+/archive/historic/2015
+/archive/historic/2018
+/archive/historic/2019
+/archive/historic/2020
 .su[a-z]
 .*.sv[a-z]
 .*.sw[a-z]
-indent.c
diff --git a/1984/anonymous/.gitignore b/1984/anonymous/.gitignore
index 376ed9f37..31e0421ed 100644
--- a/1984/anonymous/.gitignore
+++ b/1984/anonymous/.gitignore
@@ -1,4 +1,10 @@
+#
+# sort with: sort -d -u
 anonymous
 anonymous.alt
 anonymous.orig
+*.dSYM
+indent
+indent.c
+indent.o
 prog.orig
diff --git a/1984/decot/.gitignore b/1984/decot/.gitignore
index ad3856893..f00217c42 100644
--- a/1984/decot/.gitignore
+++ b/1984/decot/.gitignore
@@ -1,3 +1,9 @@
+#
+# sort with: sort -d -u
+*.dSYM
 decot
 decot.orig
+indent
+indent.c
+indent.o
 prog.orig
diff --git a/1984/laman/.gitignore b/1984/laman/.gitignore
index 9f0d9e790..81f37e38c 100644
--- a/1984/laman/.gitignore
+++ b/1984/laman/.gitignore
@@ -1,3 +1,9 @@
+#
+# sort with: sort -d -u
+*.dSYM
+indent
+indent.c
+indent.o
 laman
 laman.orig
 prog.orig
diff --git a/1984/mullender/.gitignore b/1984/mullender/.gitignore
index 8767cfb4e..2ac371f2a 100644
--- a/1984/mullender/.gitignore
+++ b/1984/mullender/.gitignore
@@ -1,7 +1,13 @@
+#
+# sort with: sort -d -u
+*.dSYM
+g.c
+gentab
+indent
+indent.c
+indent.o
 mullender
 mullender.alt
 mullender.alt2
-gentab
-g.c
 mullender.orig
 prog.orig
diff --git a/1985/applin/.gitignore b/1985/applin/.gitignore
index 65af7d048..9cf78c5ca 100644
--- a/1985/applin/.gitignore
+++ b/1985/applin/.gitignore
@@ -1,3 +1,9 @@
+#
+# sort with: sort -d -u
 applin
 applin.orig
+*.dSYM
+indent
+indent.c
+indent.o
 prog.orig
diff --git a/1985/august/.gitignore b/1985/august/.gitignore
index 94bab546a..32746afee 100644
--- a/1985/august/.gitignore
+++ b/1985/august/.gitignore
@@ -1,3 +1,9 @@
+#
+# sort with: sort -d -u
 august
 august.orig
+*.dSYM
+indent
+indent.c
+indent.o
 prog.orig
diff --git a/1985/lycklama/.gitignore b/1985/lycklama/.gitignore
index 6392e57c3..c83b9e405 100644
--- a/1985/lycklama/.gitignore
+++ b/1985/lycklama/.gitignore
@@ -1,3 +1,9 @@
+#
+# sort with: sort -d -u
+*.dSYM
+indent
+indent.c
+indent.o
 lycklama
 lycklama.alt
 lycklama.orig
diff --git a/1985/shapiro/.gitignore b/1985/shapiro/.gitignore
index 8bef23f70..f278895ba 100644
--- a/1985/shapiro/.gitignore
+++ b/1985/shapiro/.gitignore
@@ -1,4 +1,10 @@
+#
+# sort with: sort -d -u
+*.dSYM
+indent
+indent.c
+indent.o
+prog.orig
 shapiro
 shapiro.alt
 shapiro.orig
-prog.orig
diff --git a/1985/sicherman/.gitignore b/1985/sicherman/.gitignore
index 595c6629c..760f5e53b 100644
--- a/1985/sicherman/.gitignore
+++ b/1985/sicherman/.gitignore
@@ -1,4 +1,10 @@
+#
+# sort with: sort -d -u
+*.dSYM
+indent
+indent.c
+indent.o
+prog.orig
 sicherman
 sicherman.alt
 sicherman.orig
-prog.orig
diff --git a/1986/applin/.gitignore b/1986/applin/.gitignore
index 65af7d048..9cf78c5ca 100644
--- a/1986/applin/.gitignore
+++ b/1986/applin/.gitignore
@@ -1,3 +1,9 @@
+#
+# sort with: sort -d -u
 applin
 applin.orig
+*.dSYM
+indent
+indent.c
+indent.o
 prog.orig
diff --git a/1986/august/.gitignore b/1986/august/.gitignore
index 94bab546a..32746afee 100644
--- a/1986/august/.gitignore
+++ b/1986/august/.gitignore
@@ -1,3 +1,9 @@
+#
+# sort with: sort -d -u
 august
 august.orig
+*.dSYM
+indent
+indent.c
+indent.o
 prog.orig
diff --git a/1986/bright/.gitignore b/1986/bright/.gitignore
index ceefa06fb..b17d16323 100644
--- a/1986/bright/.gitignore
+++ b/1986/bright/.gitignore
@@ -1,3 +1,9 @@
+#
+# sort with: sort -d -u
 bright
 bright.orig
+*.dSYM
+indent
+indent.c
+indent.o
 prog.orig
diff --git a/1986/hague/.gitignore b/1986/hague/.gitignore
index 4f2188ba7..d4d0dcf94 100644
--- a/1986/hague/.gitignore
+++ b/1986/hague/.gitignore
@@ -1,4 +1,10 @@
+#
+# sort with: sort -d -u
+*.dSYM
 hague
 hague.alt
 hague.orig
+indent
+indent.c
+indent.o
 prog.orig
diff --git a/1986/holloway/.gitignore b/1986/holloway/.gitignore
index 497646c62..75d481aef 100644
--- a/1986/holloway/.gitignore
+++ b/1986/holloway/.gitignore
@@ -1,3 +1,9 @@
+#
+# sort with: sort -d -u
+*.dSYM
 holloway
 holloway.orig
+indent
+indent.c
+indent.o
 prog.orig
diff --git a/1986/marshall/.gitignore b/1986/marshall/.gitignore
index 1150d6ac3..6053ecf1c 100644
--- a/1986/marshall/.gitignore
+++ b/1986/marshall/.gitignore
@@ -1,4 +1,10 @@
+#
+# sort with: sort -d -u
+*.dSYM
+indent
+indent.c
+indent.o
 marshall
+marshall.alt
 marshall.orig
 prog.orig
-marshall.alt
diff --git a/1986/pawka/.gitignore b/1986/pawka/.gitignore
index c01f77fa3..4caccee3b 100644
--- a/1986/pawka/.gitignore
+++ b/1986/pawka/.gitignore
@@ -1,3 +1,9 @@
+#
+# sort with: sort -d -u
+*.dSYM
+indent
+indent.c
+indent.o
 pawka
 pawka.orig
 prog.orig
diff --git a/1986/stein/.gitignore b/1986/stein/.gitignore
index 918d8ef98..10a8e2322 100644
--- a/1986/stein/.gitignore
+++ b/1986/stein/.gitignore
@@ -1,4 +1,10 @@
+#
+# sort with: sort -d -u
 a.out
+*.dSYM
+indent
+indent.c
+indent.o
+prog.orig
 stein
 stein.orig
-prog.orig
diff --git a/1986/wall/.gitignore b/1986/wall/.gitignore
index efdb54e71..9cb3a05e2 100644
--- a/1986/wall/.gitignore
+++ b/1986/wall/.gitignore
@@ -1,4 +1,10 @@
+#
+# sort with: sort -d -u
+*.dSYM
+indent
+indent.c
+indent.o
+prog.orig
 wall
 wall.alt
 wall.orig
-prog.orig
diff --git a/1987/biggar/.gitignore b/1987/biggar/.gitignore
index a16c4d2dd..31b2b97cd 100644
--- a/1987/biggar/.gitignore
+++ b/1987/biggar/.gitignore
@@ -1,3 +1,9 @@
+#
+# sort with: sort -d -u
 biggar
 biggar.orig
+*.dSYM
+indent
+indent.c
+indent.o
 prog.orig
diff --git a/1987/heckbert/.gitignore b/1987/heckbert/.gitignore
index 723761962..0c9e6f64c 100644
--- a/1987/heckbert/.gitignore
+++ b/1987/heckbert/.gitignore
@@ -1,10 +1,16 @@
+#
+# sort with: sort -d -u
 bar
 bar.c
+*.dSYM
 foo
 foo.c
+foo.md
 heckbert
+heckbert.orig
+indent
+indent.c
+indent.o
 ph
 ph.c
-heckbert.orig
 prog.orig
-foo.md
diff --git a/1987/hines/.gitignore b/1987/hines/.gitignore
index 6f60fc57c..1fe6aeb3f 100644
--- a/1987/hines/.gitignore
+++ b/1987/hines/.gitignore
@@ -1,4 +1,10 @@
+#
+# sort with: sort -d -u
+*.dSYM
 hines
 hines.alt
 hines.orig
+indent
+indent.c
+indent.o
 prog.orig
diff --git a/1987/korn/.gitignore b/1987/korn/.gitignore
index 490a6878b..4e10ac967 100644
--- a/1987/korn/.gitignore
+++ b/1987/korn/.gitignore
@@ -1,3 +1,9 @@
+#
+# sort with: sort -d -u
+*.dSYM
+indent
+indent.c
+indent.o
 korn
 korn.orig
 prog.orig
diff --git a/1987/lievaart/.gitignore b/1987/lievaart/.gitignore
index 4c859f6cb..c77fcb9f3 100644
--- a/1987/lievaart/.gitignore
+++ b/1987/lievaart/.gitignore
@@ -1,6 +1,12 @@
+#
+# sort with: sort -d -u
+*.dSYM
+indent
+indent.c
+indent.o
 lievaart
-lievaart.alt
 lievaart2
 lievaart2.alt
+lievaart.alt
 lievaart.orig
 prog.orig
diff --git a/1987/wall/.gitignore b/1987/wall/.gitignore
index efdb54e71..9cb3a05e2 100644
--- a/1987/wall/.gitignore
+++ b/1987/wall/.gitignore
@@ -1,4 +1,10 @@
+#
+# sort with: sort -d -u
+*.dSYM
+indent
+indent.c
+indent.o
+prog.orig
 wall
 wall.alt
 wall.orig
-prog.orig
diff --git a/1987/westley/.gitignore b/1987/westley/.gitignore
index 745e11d2f..c95388e36 100644
--- a/1987/westley/.gitignore
+++ b/1987/westley/.gitignore
@@ -1,3 +1,9 @@
+#
+# sort with: sort -d -u
+*.dSYM
+indent
+indent.c
+indent.o
+prog.orig
 westley
 westley.orig
-prog.orig
diff --git a/1988/applin/.gitignore b/1988/applin/.gitignore
index f2a57c672..200cbf79c 100644
--- a/1988/applin/.gitignore
+++ b/1988/applin/.gitignore
@@ -1,7 +1,13 @@
+#
+# sort with: sort -d -u
 applin
-large.c
-zsmall
-zsmall.c
 applin.alt
 applin.orig
+*.dSYM
+indent
+indent.c
+indent.o
+large.c
 prog.orig
+zsmall
+zsmall.c
diff --git a/1988/dale/.gitignore b/1988/dale/.gitignore
index 1e84d450e..b49e063cb 100644
--- a/1988/dale/.gitignore
+++ b/1988/dale/.gitignore
@@ -1,4 +1,10 @@
+#
+# sort with: sort -d -u
+*.dSYM
 dale
 dale.alt
 dale.orig
+indent
+indent.c
+indent.o
 prog.orig
diff --git a/1988/isaak/.gitignore b/1988/isaak/.gitignore
index 6cc5143d4..9b1234944 100644
--- a/1988/isaak/.gitignore
+++ b/1988/isaak/.gitignore
@@ -1,5 +1,11 @@
+#
+# sort with: sort -d -u
+*.dSYM
+indent
+indent.c
+indent.o
 isaak
 isaak.alt
-isaak.output
 isaak.orig
+isaak.output
 prog.orig
diff --git a/1988/litmaath/.gitignore b/1988/litmaath/.gitignore
index 147973fd9..e5029428e 100644
--- a/1988/litmaath/.gitignore
+++ b/1988/litmaath/.gitignore
@@ -1,3 +1,9 @@
+#
+# sort with: sort -d -u
+*.dSYM
+indent
+indent.c
+indent.o
 litmaath
 litmaath.alt
 litmaath.orig
diff --git a/1988/phillipps/.gitignore b/1988/phillipps/.gitignore
index 4aabe24bb..cb09ce42f 100644
--- a/1988/phillipps/.gitignore
+++ b/1988/phillipps/.gitignore
@@ -1,3 +1,9 @@
+#
+# sort with: sort -d -u
+*.dSYM
+indent
+indent.c
+indent.o
 phillipps
 phillipps.orig
 prog.orig
diff --git a/1988/reddy/.gitignore b/1988/reddy/.gitignore
index a2bce76c3..861c1d767 100644
--- a/1988/reddy/.gitignore
+++ b/1988/reddy/.gitignore
@@ -1,3 +1,9 @@
+#
+# sort with: sort -d -u
+*.dSYM
+indent
+indent.c
+indent.o
+prog.orig
 reddy
 reddy.orig
-prog.orig
diff --git a/1988/robison/.gitignore b/1988/robison/.gitignore
index 672ba4f0c..4fdea5695 100644
--- a/1988/robison/.gitignore
+++ b/1988/robison/.gitignore
@@ -1,3 +1,9 @@
+#
+# sort with: sort -d -u
+*.dSYM
+indent
+indent.c
+indent.o
+prog.orig
 robison
 robison.orig
-prog.orig
diff --git a/1988/spinellis/.gitignore b/1988/spinellis/.gitignore
index 27171b2cf..6a6607176 100644
--- a/1988/spinellis/.gitignore
+++ b/1988/spinellis/.gitignore
@@ -1,5 +1,11 @@
+#
+# sort with: sort -d -u
+*.dSYM
+indent
+indent.c
+indent.o
 prog.c
+prog.orig
 spinellis
 spinellis.alt
 spinellis.orig
-prog.orig
diff --git a/1988/westley/.gitignore b/1988/westley/.gitignore
index 9b69ec7c5..667dfb2a1 100644
--- a/1988/westley/.gitignore
+++ b/1988/westley/.gitignore
@@ -1,4 +1,10 @@
+#
+# sort with: sort -d -u
+*.dSYM
+indent
+indent.c
+indent.o
+prog.orig
 westley
 westley.alt
 westley.orig
-prog.orig
diff --git a/1989/fubar/.gitignore b/1989/fubar/.gitignore
index 7d78090b1..c51d2c07f 100644
--- a/1989/fubar/.gitignore
+++ b/1989/fubar/.gitignore
@@ -1,7 +1,13 @@
+#
+# sort with: sort -d -u
+*.dSYM
 fubar
+fubar.orig
+indent
+indent.c
+indent.o
 ouroboros
 ouroboros.c
+prog.orig
 x
 x1
-fubar.orig
-prog.orig
diff --git a/1989/jar.1/.gitignore b/1989/jar.1/.gitignore
index dcddd407b..b3869337b 100644
--- a/1989/jar.1/.gitignore
+++ b/1989/jar.1/.gitignore
@@ -1,3 +1,9 @@
+#
+# sort with: sort -d -u
+*.dSYM
+indent
+indent.c
+indent.o
 jar.1
 jar.1.alt
 jar.1.orig
diff --git a/1989/jar.2/.gitignore b/1989/jar.2/.gitignore
index 4ea9ded3b..1948ed83a 100644
--- a/1989/jar.2/.gitignore
+++ b/1989/jar.2/.gitignore
@@ -1,3 +1,9 @@
+#
+# sort with: sort -d -u
+*.dSYM
+indent
+indent.c
+indent.o
 jar.2
 jar.2.orig
 prog.orig
diff --git a/1989/ovdluhe/.gitignore b/1989/ovdluhe/.gitignore
index 21b883e19..ca644c2bb 100644
--- a/1989/ovdluhe/.gitignore
+++ b/1989/ovdluhe/.gitignore
@@ -1,3 +1,9 @@
+#
+# sort with: sort -d -u
+*.dSYM
+indent
+indent.c
+indent.o
 ovdluhe
 ovdluhe.alt
 ovdluhe.orig
diff --git a/1989/paul/.gitignore b/1989/paul/.gitignore
index b824b34c9..8a84f502d 100644
--- a/1989/paul/.gitignore
+++ b/1989/paul/.gitignore
@@ -1,3 +1,9 @@
+#
+# sort with: sort -d -u
+*.dSYM
+indent
+indent.c
+indent.o
 paul
 paul.alt
 paul.orig
diff --git a/1989/robison/.gitignore b/1989/robison/.gitignore
index 672ba4f0c..4fdea5695 100644
--- a/1989/robison/.gitignore
+++ b/1989/robison/.gitignore
@@ -1,3 +1,9 @@
+#
+# sort with: sort -d -u
+*.dSYM
+indent
+indent.c
+indent.o
+prog.orig
 robison
 robison.orig
-prog.orig
diff --git a/1989/roemer/.gitignore b/1989/roemer/.gitignore
index 35799487b..b52cea56f 100644
--- a/1989/roemer/.gitignore
+++ b/1989/roemer/.gitignore
@@ -1,3 +1,9 @@
+#
+# sort with: sort -d -u
+*.dSYM
+indent
+indent.c
+indent.o
+prog.orig
 roemer
 roemer.orig
-prog.orig
diff --git a/1989/tromp/.gitignore b/1989/tromp/.gitignore
index 7aedf5800..684ebc1ff 100644
--- a/1989/tromp/.gitignore
+++ b/1989/tromp/.gitignore
@@ -1,5 +1,11 @@
+#
+# sort with: sort -d -u
+HI
+*.dSYM
+indent
+indent.c
+indent.o
+prog.orig
 tromp
 tromp.alt
-HI
 tromp.orig
-prog.orig
diff --git a/1989/vanb/.gitignore b/1989/vanb/.gitignore
index 43ddaba26..beff33ad9 100644
--- a/1989/vanb/.gitignore
+++ b/1989/vanb/.gitignore
@@ -1,3 +1,9 @@
+#
+# sort with: sort -d -u
+*.dSYM
+indent
+indent.c
+indent.o
+prog.orig
 vanb
 vanb.orig
-prog.orig
diff --git a/1989/westley/.gitignore b/1989/westley/.gitignore
index 7a551420e..cfb8b4041 100644
--- a/1989/westley/.gitignore
+++ b/1989/westley/.gitignore
@@ -1,20 +1,26 @@
+#
+# sort with: sort -d -u
 alt.ver0
 alt.ver0.c
-ver0
-ver0.c
 alt.ver1
 alt.ver1.c
-ver1
-ver1.c
 alt.ver2
 alt.ver2.c
-ver2
-ver2.c
 alt.ver3
 alt.ver3.c
+*.dSYM
+indent
+indent.c
+indent.o
+prog.orig
+ver0
+ver0.c
+ver1
+ver1.c
+ver2
+ver2.c
 ver3
 ver3.c
 westley
 westley.alt
 westley.orig
-prog.orig
diff --git a/1990/.gitignore b/1990/.gitignore
index 7f047df8e..22823487b 100644
--- a/1990/.gitignore
+++ b/1990/.gitignore
@@ -1,18 +1,2 @@
-baruch/baruch
-cmills/cmills
-dds/dds
-dg/dg
-jaw/atob
-jaw/jaw
-jaw/zcat
-pjr/pjr
-scjones/scjones
-stig/o
-stig/o.c
-tbr/tbr
-theorem/fibonacci
-theorem/fibonacci.c
-theorem/sorter
-theorem/sorter.c
-theorem/theorem
-westley/westley
+#
+# sort with: sort -d -u
diff --git a/1990/baruch/.gitignore b/1990/baruch/.gitignore
index 4c7547c4e..02df7fe70 100644
--- a/1990/baruch/.gitignore
+++ b/1990/baruch/.gitignore
@@ -1,4 +1,10 @@
+#
+# sort with: sort -d -u
 baruch
 baruch.alt
 baruch.orig
+*.dSYM
+indent
+indent.c
+indent.o
 prog.orig
diff --git a/1990/cmills/.gitignore b/1990/cmills/.gitignore
index 4dbfe182e..5decb4b64 100644
--- a/1990/cmills/.gitignore
+++ b/1990/cmills/.gitignore
@@ -1,3 +1,9 @@
+#
+# sort with: sort -d -u
 cmills
 cmills.orig
+*.dSYM
+indent
+indent.c
+indent.o
 prog.orig
diff --git a/1990/dds/.gitignore b/1990/dds/.gitignore
index 36e62c025..22f29565b 100644
--- a/1990/dds/.gitignore
+++ b/1990/dds/.gitignore
@@ -1,3 +1,9 @@
+#
+# sort with: sort -d -u
+*.dSYM
 dds
 dds.orig
+indent
+indent.c
+indent.o
 prog.orig
diff --git a/1990/dg/.gitignore b/1990/dg/.gitignore
index a5524b15a..ffa360008 100644
--- a/1990/dg/.gitignore
+++ b/1990/dg/.gitignore
@@ -1,3 +1,9 @@
+#
+# sort with: sort -d -u
+*.dSYM
 dg
 dg.orig
+indent
+indent.c
+indent.o
 prog.orig
diff --git a/1990/jaw/.gitignore b/1990/jaw/.gitignore
index 22eb8875e..c243609d3 100644
--- a/1990/jaw/.gitignore
+++ b/1990/jaw/.gitignore
@@ -1,8 +1,14 @@
+#
+# sort with: sort -d -u
 atob
+*.dSYM
+indent
+indent.c
+indent.o
 jaw
-zcat
+jaw.orig
+prog.orig
 receive
 unshark
 unshark.c
-jaw.orig
-prog.orig
+zcat
diff --git a/1990/pjr/.gitignore b/1990/pjr/.gitignore
index 5b3bbfb5e..5259435f5 100644
--- a/1990/pjr/.gitignore
+++ b/1990/pjr/.gitignore
@@ -1,3 +1,9 @@
+#
+# sort with: sort -d -u
+*.dSYM
+indent
+indent.c
+indent.o
 pjr
 pjr.alt
 pjr.orig
diff --git a/1990/scjones/.gitignore b/1990/scjones/.gitignore
index 57bc24fbb..828493f4e 100644
--- a/1990/scjones/.gitignore
+++ b/1990/scjones/.gitignore
@@ -1,3 +1,9 @@
+#
+# sort with: sort -d -u
+*.dSYM
+indent
+indent.c
+indent.o
+prog.orig
 scjones
 scjones.orig
-prog.orig
diff --git a/1990/stig/.gitignore b/1990/stig/.gitignore
index a12048487..518ce4d44 100644
--- a/1990/stig/.gitignore
+++ b/1990/stig/.gitignore
@@ -1,5 +1,11 @@
+#
+# sort with: sort -d -u
+*.dSYM
+indent
+indent.c
+indent.o
 o
 o.c
+prog.orig
 stig
 stig.orig
-prog.orig
diff --git a/1990/tbr/.gitignore b/1990/tbr/.gitignore
index 341d63c34..b23b26373 100644
--- a/1990/tbr/.gitignore
+++ b/1990/tbr/.gitignore
@@ -1,4 +1,10 @@
-tbr
-tbr.orig
-tbr.alt
+#
+# sort with: sort -d -u
+*.dSYM
+indent
+indent.c
+indent.o
 prog.orig
+tbr
+tbr.alt
+tbr.orig
diff --git a/1990/theorem/.gitignore b/1990/theorem/.gitignore
index 00f950eb6..7cc7e0d56 100644
--- a/1990/theorem/.gitignore
+++ b/1990/theorem/.gitignore
@@ -1,10 +1,16 @@
-theorem
+#
+# sort with: sort -d -u
+*.dSYM
 fibonacci
 fibonacci.c
+indent
+indent.c
+indent.o
 mariano
+prog.orig
 sorter
 sorter.c
+theorem
 theorem_bkp
 theorem_bkp.c
 theorem.orig
-prog.orig
diff --git a/1990/westley/.gitignore b/1990/westley/.gitignore
index 745e11d2f..c95388e36 100644
--- a/1990/westley/.gitignore
+++ b/1990/westley/.gitignore
@@ -1,3 +1,9 @@
+#
+# sort with: sort -d -u
+*.dSYM
+indent
+indent.c
+indent.o
+prog.orig
 westley
 westley.orig
-prog.orig
diff --git a/1991/ant/.gitignore b/1991/ant/.gitignore
index b54424400..e888c8f21 100644
--- a/1991/ant/.gitignore
+++ b/1991/ant/.gitignore
@@ -1,6 +1,12 @@
+#
+# sort with: sort -d -u
 ant
 ant.alt
 ant.orig
+*.dSYM
 hill
+indent
+indent.c
+indent.o
 mole
 prog.orig
diff --git a/1991/brnstnd/.gitignore b/1991/brnstnd/.gitignore
index 5fe33081a..829c29204 100644
--- a/1991/brnstnd/.gitignore
+++ b/1991/brnstnd/.gitignore
@@ -1,4 +1,10 @@
+#
+# sort with: sort -d -u
 brnstnd
 brnstnd.orig
+*.dSYM
+indent
+indent.c
+indent.o
 prog.orig
 sorta
diff --git a/1991/buzzard/.gitignore b/1991/buzzard/.gitignore
index fc88541db..612917cc6 100644
--- a/1991/buzzard/.gitignore
+++ b/1991/buzzard/.gitignore
@@ -1,4 +1,10 @@
+#
+# sort with: sort -d -u
 buzzard
 buzzard.alt
 buzzard.orig
+*.dSYM
+indent
+indent.c
+indent.o
 prog.orig
diff --git a/1991/cdupont/.gitignore b/1991/cdupont/.gitignore
index 9accc2c55..9fc79235f 100644
--- a/1991/cdupont/.gitignore
+++ b/1991/cdupont/.gitignore
@@ -1,3 +1,9 @@
+#
+# sort with: sort -d -u
 cdupont
 cdupont.orig
+*.dSYM
+indent
+indent.c
+indent.o
 prog.orig
diff --git a/1991/davidguy/.gitignore b/1991/davidguy/.gitignore
index ad25838e8..0fefbbcdc 100644
--- a/1991/davidguy/.gitignore
+++ b/1991/davidguy/.gitignore
@@ -1,3 +1,9 @@
+#
+# sort with: sort -d -u
+*.dSYM
 davidguy
 davidguy.orig
+indent
+indent.c
+indent.o
 prog.orig
diff --git a/1991/dds/.gitignore b/1991/dds/.gitignore
index f21a07919..6c0a43f97 100644
--- a/1991/dds/.gitignore
+++ b/1991/dds/.gitignore
@@ -1,5 +1,11 @@
-dds
+#
+# sort with: sort -d -u
 a.c
 a.out
+*.dSYM
+dds
 dds.orig
+indent
+indent.c
+indent.o
 prog.orig
diff --git a/1991/fine/.gitignore b/1991/fine/.gitignore
index 693c74803..79ca381e8 100644
--- a/1991/fine/.gitignore
+++ b/1991/fine/.gitignore
@@ -1,3 +1,9 @@
+#
+# sort with: sort -d -u
+*.dSYM
 fine
 fine.orig
+indent
+indent.c
+indent.o
 prog.orig
diff --git a/1991/rince/.gitignore b/1991/rince/.gitignore
index d43cf2e62..03504b307 100644
--- a/1991/rince/.gitignore
+++ b/1991/rince/.gitignore
@@ -1,5 +1,11 @@
+#
+# sort with: sort -d -u
+*.dSYM
+indent
+indent.c
+indent.o
+prog.orig
 rince
 rince.alt
 rince.alt2
 rince.orig
-prog.orig
diff --git a/1991/westley/.gitignore b/1991/westley/.gitignore
index ca193c527..406da5318 100644
--- a/1991/westley/.gitignore
+++ b/1991/westley/.gitignore
@@ -1,17 +1,23 @@
+#
+# sort with: sort -d -u
+*.dSYM
+indent
+indent.c
+indent.o
 merlyn
-merlyn.c
 merlyn.alt.c
+merlyn.c
 nextmove
-nextmove.c
 nextmove.alt.c
+nextmove.c
+prog.orig
 ttt
 ttt.alt
+ttt.alt_old.c
 ttt_game
-ttt_game.c
 ttt_game.alt.c
+ttt_game.c
+ttt_old.c
 westley
 westley.alt
-ttt.alt_old.c
-ttt_old.c
 westley.orig
-prog.orig
diff --git a/1992/.gitignore b/1992/.gitignore
new file mode 100644
index 000000000..0f3654a90
--- /dev/null
+++ b/1992/.gitignore
@@ -0,0 +1,4 @@
+#
+# sort with: sort -d -u
+mkentry
+mkentty.o
diff --git a/1992/adrian/.gitignore b/1992/adrian/.gitignore
index 476d59722..d62e915cf 100644
--- a/1992/adrian/.gitignore
+++ b/1992/adrian/.gitignore
@@ -1,3 +1,5 @@
+#
+# sort with: sort -d -u
 adbasename
 adbasename.c
 adecho
@@ -6,9 +8,13 @@ adgrep
 adhead
 adhead.c
 adrian
+adrian.orig
 adsleep
 adsleep.c
 adwc
 adwc.c
-adrian.orig
+*.dSYM
+indent
+indent.c
+indent.o
 prog.orig
diff --git a/1992/albert/.gitignore b/1992/albert/.gitignore
index f2de7f594..0d3d73c40 100644
--- a/1992/albert/.gitignore
+++ b/1992/albert/.gitignore
@@ -1,4 +1,10 @@
+#
+# sort with: sort -d -u
 albert
 albert.alt
 albert.orig
+*.dSYM
+indent
+indent.c
+indent.o
 prog.orig
diff --git a/1992/ant/.gitignore b/1992/ant/.gitignore
index d421620bc..778ebd537 100644
--- a/1992/ant/.gitignore
+++ b/1992/ant/.gitignore
@@ -1,7 +1,13 @@
+#
+# sort with: sort -d -u
 am
 am.safe
 ant
-node.*
-leaf.*
 ant.orig
+*.dSYM
+indent
+indent.c
+indent.o
+leaf.*
+node.*
 prog.orig
diff --git a/1992/buzzard.1/.gitignore b/1992/buzzard.1/.gitignore
index d99f23885..68d15b2b0 100644
--- a/1992/buzzard.1/.gitignore
+++ b/1992/buzzard.1/.gitignore
@@ -1,6 +1,12 @@
+#
+# sort with: sort -d -u
 babble
 babble.cppcb
 buzzard.1
-tmp
 buzzard.1.orig
+*.dSYM
+indent
+indent.c
+indent.o
 prog.orig
+tmp
diff --git a/1992/buzzard.2/.gitignore b/1992/buzzard.2/.gitignore
index 174bc00a2..8ae53d7e6 100644
--- a/1992/buzzard.2/.gitignore
+++ b/1992/buzzard.2/.gitignore
@@ -1,4 +1,10 @@
+#
+# sort with: sort -d -u
 buzzard.2
-first
 buzzard.2.orig
+*.dSYM
+first
+indent
+indent.c
+indent.o
 prog.orig
diff --git a/1992/gson/.gitignore b/1992/gson/.gitignore
index dd540b95a..283d55034 100644
--- a/1992/gson/.gitignore
+++ b/1992/gson/.gitignore
@@ -1,5 +1,11 @@
-gson
+#
+# sort with: sort -d -u
 ag
-words
+*.dSYM
+gson
 gson.orig
+indent
+indent.c
+indent.o
 prog.orig
+words
diff --git a/1992/imc/.gitignore b/1992/imc/.gitignore
index 45bd3341b..a1cd269d0 100644
--- a/1992/imc/.gitignore
+++ b/1992/imc/.gitignore
@@ -1,5 +1,11 @@
+#
+# sort with: sort -d -u
+*.dSYM
 imc
+imc.orig
+indent
+indent.c
+indent.o
+prog.orig
 screen1.ras
 screen2.ras
-imc.orig
-prog.orig
diff --git a/1992/kivinen/.gitignore b/1992/kivinen/.gitignore
index 6319554d0..df7c88c0a 100644
--- a/1992/kivinen/.gitignore
+++ b/1992/kivinen/.gitignore
@@ -1,3 +1,9 @@
+#
+# sort with: sort -d -u
+*.dSYM
+indent
+indent.c
+indent.o
 kivinen
 kivinen.alt
 kivinen.orig
diff --git a/1992/lush/.gitignore b/1992/lush/.gitignore
index be32daf3b..0880aa193 100644
--- a/1992/lush/.gitignore
+++ b/1992/lush/.gitignore
@@ -1,3 +1,9 @@
+#
+# sort with: sort -d -u
+*.dSYM
+indent
+indent.c
+indent.o
 lush
 lush.alt
 lush.orig
diff --git a/1992/marangon/.gitignore b/1992/marangon/.gitignore
index 2d0ac2cc4..2acce7fc4 100644
--- a/1992/marangon/.gitignore
+++ b/1992/marangon/.gitignore
@@ -1,3 +1,9 @@
+#
+# sort with: sort -d -u
+*.dSYM
+indent
+indent.c
+indent.o
 marangon
 marangon.orig
 prog.orig
diff --git a/1992/nathan/.gitignore b/1992/nathan/.gitignore
index 838ede84d..4301b7cb0 100644
--- a/1992/nathan/.gitignore
+++ b/1992/nathan/.gitignore
@@ -1,5 +1,11 @@
+#
+# sort with: sort -d -u
+barfoof.c
+*.dSYM
+foobarf.c
+indent
+indent.c
+indent.o
 nathan
 nathan.orig
 prog.orig
-barfoof.c
-foobarf.c
diff --git a/1992/vern/.gitignore b/1992/vern/.gitignore
index b370c1ac4..dd8fe92ef 100644
--- a/1992/vern/.gitignore
+++ b/1992/vern/.gitignore
@@ -1,4 +1,10 @@
-vern
-vern.tmp.c
-vern.orig
+#
+# sort with: sort -d -u
+*.dSYM
+indent
+indent.c
+indent.o
 prog.orig
+vern
+vern.orig
+vern.tmp.c
diff --git a/1992/westley/.gitignore b/1992/westley/.gitignore
index 9b69ec7c5..667dfb2a1 100644
--- a/1992/westley/.gitignore
+++ b/1992/westley/.gitignore
@@ -1,4 +1,10 @@
+#
+# sort with: sort -d -u
+*.dSYM
+indent
+indent.c
+indent.o
+prog.orig
 westley
 westley.alt
 westley.orig
-prog.orig
diff --git a/1993/.gitignore b/1993/.gitignore
index 1e600ff76..0f3654a90 100644
--- a/1993/.gitignore
+++ b/1993/.gitignore
@@ -1,13 +1,4 @@
-ant/ant
-cmills/mills
-dgibson/data.name
-dgibson/data.name2
-dgibson/life.d
-ejb/ejb
-jonth/jonth
-jonth/jonth.tmp.c
-leo/leo
-plummer/plummer
-rince/rince
-schnitzi/schnitzi
-vanb/vanb
+#
+# sort with: sort -d -u
+mkentry
+mkentty.o
diff --git a/1993/ant/.gitignore b/1993/ant/.gitignore
index 30a97e7dc..05c6b23fb 100644
--- a/1993/ant/.gitignore
+++ b/1993/ant/.gitignore
@@ -1,6 +1,11 @@
+#
+# sort with: sort -d -u
 ag
 ag.txt
 ant
-ant
 ant.orig
+*.dSYM
+indent
+indent.c
+indent.o
 prog.orig
diff --git a/1993/cmills/.gitignore b/1993/cmills/.gitignore
index 4ff19a740..e6daacd13 100644
--- a/1993/cmills/.gitignore
+++ b/1993/cmills/.gitignore
@@ -1,4 +1,10 @@
+#
+# sort with: sort -d -u
 cmills
 cmills.alt
 cmills.orig
+*.dSYM
+indent
+indent.c
+indent.o
 prog.orig
diff --git a/1993/dgibson/.gitignore b/1993/dgibson/.gitignore
index 686bb0560..b86e50731 100644
--- a/1993/dgibson/.gitignore
+++ b/1993/dgibson/.gitignore
@@ -1,5 +1,11 @@
+#
+# sort with: sort -d -u
+*.dSYM
 data.name
 dgibson
-life.d 
 dgibson.orig
+indent
+indent.c
+indent.o
+life.d 
 prog.orig
diff --git a/1993/ejb/.gitignore b/1993/ejb/.gitignore
index 398a2bf1f..6487b7665 100644
--- a/1993/ejb/.gitignore
+++ b/1993/ejb/.gitignore
@@ -1,3 +1,9 @@
+#
+# sort with: sort -d -u
+*.dSYM
 ejb
 ejb.orig
+indent
+indent.c
+indent.o
 prog.orig
diff --git a/1993/jonth/.gitignore b/1993/jonth/.gitignore
index c3ee28755..22f69c1f7 100644
--- a/1993/jonth/.gitignore
+++ b/1993/jonth/.gitignore
@@ -1,4 +1,10 @@
+#
+# sort with: sort -d -u
+*.dSYM
+indent
+indent.c
+indent.o
 jonth
-jonth.tmp.c
 jonth.orig
+jonth.tmp.c
 prog.orig
diff --git a/1993/leo/.gitignore b/1993/leo/.gitignore
index 5f9e511dd..7f83ef3e6 100644
--- a/1993/leo/.gitignore
+++ b/1993/leo/.gitignore
@@ -1,4 +1,10 @@
+#
+# sort with: sort -d -u
+*.dSYM
+indent
+indent.c
+indent.o
 leo
-mind
 leo.orig
+mind
 prog.orig
diff --git a/1993/lmfjyh/.gitignore b/1993/lmfjyh/.gitignore
index 638878a76..14e41f172 100644
--- a/1993/lmfjyh/.gitignore
+++ b/1993/lmfjyh/.gitignore
@@ -1,4 +1,10 @@
+#
+# sort with: sort -d -u
 "*
+*.dSYM
+indent
+indent.c
+indent.o
 lmfjyh
 lmfjyh.alt
 lmfjyh.orig
diff --git a/1993/plummer/.gitignore b/1993/plummer/.gitignore
index 7db60a5bd..72ad4189e 100644
--- a/1993/plummer/.gitignore
+++ b/1993/plummer/.gitignore
@@ -1,3 +1,9 @@
+#
+# sort with: sort -d -u
+*.dSYM
+indent
+indent.c
+indent.o
 plummer
 plummer.alt
 plummer.orig
diff --git a/1993/rince/.gitignore b/1993/rince/.gitignore
index 9bee489dc..362d34696 100644
--- a/1993/rince/.gitignore
+++ b/1993/rince/.gitignore
@@ -1,8 +1,14 @@
+#
+# sort with: sort -d -u
+*.dSYM
+indent
+indent.c
+indent.o
 jkb
 jkb.alt
 jkb.alt2
+prog.orig
 rince
-rince.orig
 rince.alt
 rince.alt2
-prog.orig
+rince.orig
diff --git a/1993/schnitzi/.gitignore b/1993/schnitzi/.gitignore
index 8eb45f60f..cd8a76fb0 100644
--- a/1993/schnitzi/.gitignore
+++ b/1993/schnitzi/.gitignore
@@ -1,3 +1,9 @@
+#
+# sort with: sort -d -u
+*.dSYM
+indent
+indent.c
+indent.o
+prog.orig
 schnitzi
 schnitzi.orig
-prog.orig
diff --git a/1993/vanb/.gitignore b/1993/vanb/.gitignore
index e124c492a..dc861f682 100644
--- a/1993/vanb/.gitignore
+++ b/1993/vanb/.gitignore
@@ -1,4 +1,10 @@
+#
+# sort with: sort -d -u
+*.dSYM
+indent
+indent.c
+indent.o
+prog.orig
 vanb
 vanb.alt
 vanb.orig
-prog.orig
diff --git a/1994/.gitignore b/1994/.gitignore
new file mode 100644
index 000000000..0f3654a90
--- /dev/null
+++ b/1994/.gitignore
@@ -0,0 +1,4 @@
+#
+# sort with: sort -d -u
+mkentry
+mkentty.o
diff --git a/1994/dodsond1/.gitignore b/1994/dodsond1/.gitignore
index 26b7faebe..1f4eff58b 100644
--- a/1994/dodsond1/.gitignore
+++ b/1994/dodsond1/.gitignore
@@ -1,3 +1,9 @@
+#
+# sort with: sort -d -u
+*.dSYM
 dodsond1
 dodsond1.orig
+indent
+indent.c
+indent.o
 prog.orig
diff --git a/1994/dodsond2/.gitignore b/1994/dodsond2/.gitignore
index bfe05b95b..b43bf7a3e 100644
--- a/1994/dodsond2/.gitignore
+++ b/1994/dodsond2/.gitignore
@@ -1,4 +1,10 @@
+#
+# sort with: sort -d -u
+*.dSYM
 dodsond2
 dodsond2.alt
 dodsond2.orig
+indent
+indent.c
+indent.o
 prog.orig
diff --git a/1994/horton/.gitignore b/1994/horton/.gitignore
index d39e2224f..7bf35f8fd 100644
--- a/1994/horton/.gitignore
+++ b/1994/horton/.gitignore
@@ -1,5 +1,11 @@
+#
+# sort with: sort -d -u
+*.dSYM
 gtface
 horton
 horton.alt
 horton.orig
+indent
+indent.c
+indent.o
 prog.orig
diff --git a/1994/imc/.gitignore b/1994/imc/.gitignore
index 4cc262407..50174b419 100644
--- a/1994/imc/.gitignore
+++ b/1994/imc/.gitignore
@@ -1,3 +1,9 @@
+#
+# sort with: sort -d -u
+*.dSYM
 imc
 imc.orig
+indent
+indent.c
+indent.o
 prog.orig
diff --git a/1994/ldb/.gitignore b/1994/ldb/.gitignore
index 5e8bf72a4..919494b03 100644
--- a/1994/ldb/.gitignore
+++ b/1994/ldb/.gitignore
@@ -1,3 +1,9 @@
+#
+# sort with: sort -d -u
+*.dSYM
+indent
+indent.c
+indent.o
 ldb
 ldb.alt
 ldb.orig
diff --git a/1994/schnitzi/.gitignore b/1994/schnitzi/.gitignore
index 5c68dfa9a..f8f3ac60e 100644
--- a/1994/schnitzi/.gitignore
+++ b/1994/schnitzi/.gitignore
@@ -1,7 +1,13 @@
+#
+# sort with: sort -d -u
+*.dSYM
+indent
+indent.c
+indent.o
+prog.orig
 schnitzi
 schnitzi2
 schnitzi2.c
 schnitzi.alt
 schnitzi.alt2
 schnitzi.orig
-prog.orig
diff --git a/1994/shapiro/.gitignore b/1994/shapiro/.gitignore
index befeeb4bc..042eef548 100644
--- a/1994/shapiro/.gitignore
+++ b/1994/shapiro/.gitignore
@@ -1,5 +1,11 @@
+#
+# sort with: sort -d -u
+*.dSYM
+indent
+indent.c
+indent.o
+prog.orig
 shapiro
+shapiro.orig
 shapiro_t1
 shapiro_t2.c
-shapiro.orig
-prog.orig
diff --git a/1994/smr/.gitignore b/1994/smr/.gitignore
index 82da59856..3495007e3 100644
--- a/1994/smr/.gitignore
+++ b/1994/smr/.gitignore
@@ -1,4 +1,10 @@
-smr
-smr.out
-smr.orig
+#
+# sort with: sort -d -u
+*.dSYM
+indent
+indent.c
+indent.o
 prog.orig
+smr
+smr.orig
+smr.out
diff --git a/1994/tvr/.gitignore b/1994/tvr/.gitignore
index d21da422a..3d6367952 100644
--- a/1994/tvr/.gitignore
+++ b/1994/tvr/.gitignore
@@ -1,4 +1,10 @@
+#
+# sort with: sort -d -u
+*.dSYM
+indent
+indent.c
+indent.o
+prog.orig
 tvr
 tvr.alt
 tvr.orig
-prog.orig
diff --git a/1994/weisberg/.gitignore b/1994/weisberg/.gitignore
index 250a33e42..c2fbc3155 100644
--- a/1994/weisberg/.gitignore
+++ b/1994/weisberg/.gitignore
@@ -1,4 +1,10 @@
+#
+# sort with: sort -d -u
+*.dSYM
+indent
+indent.c
+indent.o
+prog.orig
 weisberg
 weisberg.alt
 weisberg.orig
-prog.orig
diff --git a/1994/westley/.gitignore b/1994/westley/.gitignore
index 745e11d2f..c95388e36 100644
--- a/1994/westley/.gitignore
+++ b/1994/westley/.gitignore
@@ -1,3 +1,9 @@
+#
+# sort with: sort -d -u
+*.dSYM
+indent
+indent.c
+indent.o
+prog.orig
 westley
 westley.orig
-prog.orig
diff --git a/1995/.gitignore b/1995/.gitignore
new file mode 100644
index 000000000..0f3654a90
--- /dev/null
+++ b/1995/.gitignore
@@ -0,0 +1,4 @@
+#
+# sort with: sort -d -u
+mkentry
+mkentty.o
diff --git a/1995/cdua/.gitignore b/1995/cdua/.gitignore
index 21ae42e19..de505c93b 100644
--- a/1995/cdua/.gitignore
+++ b/1995/cdua/.gitignore
@@ -1,4 +1,10 @@
+#
+# sort with: sort -d -u
 cdua
 cdua.alt
 cdua.orig
+*.dSYM
+indent
+indent.c
+indent.o
 prog.orig
diff --git a/1995/dodsond1/.gitignore b/1995/dodsond1/.gitignore
index 26b7faebe..1f4eff58b 100644
--- a/1995/dodsond1/.gitignore
+++ b/1995/dodsond1/.gitignore
@@ -1,3 +1,9 @@
+#
+# sort with: sort -d -u
+*.dSYM
 dodsond1
 dodsond1.orig
+indent
+indent.c
+indent.o
 prog.orig
diff --git a/1995/dodsond2/.gitignore b/1995/dodsond2/.gitignore
index e2294cd67..4eb2e5d0d 100644
--- a/1995/dodsond2/.gitignore
+++ b/1995/dodsond2/.gitignore
@@ -1,3 +1,9 @@
+#
+# sort with: sort -d -u
+*.dSYM
 dodsond2
 dodsond2.orig
+indent
+indent.c
+indent.o
 prog.orig
diff --git a/1995/esde/.gitignore b/1995/esde/.gitignore
index f515d9de4..d67ca3fe7 100644
--- a/1995/esde/.gitignore
+++ b/1995/esde/.gitignore
@@ -1,3 +1,9 @@
+#
+# sort with: sort -d -u
+*.dSYM
 esde
 esde.orig
+indent
+indent.c
+indent.o
 prog.orig
diff --git a/1995/garry/.gitignore b/1995/garry/.gitignore
index 723db6bbb..d88fdba9e 100644
--- a/1995/garry/.gitignore
+++ b/1995/garry/.gitignore
@@ -1,4 +1,10 @@
+#
+# sort with: sort -d -u
+*.dSYM
 garry
 garry.alt
 garry.orig
+indent
+indent.c
+indent.o
 prog.orig
diff --git a/1995/heathbar/.gitignore b/1995/heathbar/.gitignore
index 9bfc99bbe..11d1feeca 100644
--- a/1995/heathbar/.gitignore
+++ b/1995/heathbar/.gitignore
@@ -1,3 +1,9 @@
+#
+# sort with: sort -d -u
+*.dSYM
 heathbar
 heathbar.orig
+indent
+indent.c
+indent.o
 prog.orig
diff --git a/1995/leo/.gitignore b/1995/leo/.gitignore
index 53c03ba31..3a8578d5c 100644
--- a/1995/leo/.gitignore
+++ b/1995/leo/.gitignore
@@ -1,3 +1,9 @@
+#
+# sort with: sort -d -u
+*.dSYM
+indent
+indent.c
+indent.o
 leo
 leo.orig
 prog.orig
diff --git a/1995/makarios/.gitignore b/1995/makarios/.gitignore
index 47d9c2177..57952f8d0 100644
--- a/1995/makarios/.gitignore
+++ b/1995/makarios/.gitignore
@@ -1,3 +1,9 @@
+#
+# sort with: sort -d -u
+*.dSYM
+indent
+indent.c
+indent.o
 makarios
 makarios.orig
 prog.orig
diff --git a/1995/savastio/.gitignore b/1995/savastio/.gitignore
index ba799e98f..126a92046 100644
--- a/1995/savastio/.gitignore
+++ b/1995/savastio/.gitignore
@@ -1,3 +1,9 @@
+#
+# sort with: sort -d -u
+*.dSYM
+indent
+indent.c
+indent.o
+prog.orig
 savastio
 savastio.orig
-prog.orig
diff --git a/1995/schnitzi/.gitignore b/1995/schnitzi/.gitignore
index 8eb45f60f..cd8a76fb0 100644
--- a/1995/schnitzi/.gitignore
+++ b/1995/schnitzi/.gitignore
@@ -1,3 +1,9 @@
+#
+# sort with: sort -d -u
+*.dSYM
+indent
+indent.c
+indent.o
+prog.orig
 schnitzi
 schnitzi.orig
-prog.orig
diff --git a/1995/spinellis/.gitignore b/1995/spinellis/.gitignore
index 6e62c02f6..d34d0c1dd 100644
--- a/1995/spinellis/.gitignore
+++ b/1995/spinellis/.gitignore
@@ -1,3 +1,9 @@
+#
+# sort with: sort -d -u
+*.dSYM
+indent
+indent.c
+indent.o
+prog.orig
 spinellis
 spinellis.orig
-prog.orig
diff --git a/1995/vanschnitz/.gitignore b/1995/vanschnitz/.gitignore
index bffc28628..eb933d711 100644
--- a/1995/vanschnitz/.gitignore
+++ b/1995/vanschnitz/.gitignore
@@ -1,3 +1,9 @@
+#
+# sort with: sort -d -u
+*.dSYM
+indent
+indent.c
+indent.o
+prog.orig
 vanschnitz
 vanschnitz.orig
-prog.orig
diff --git a/1996/.gitignore b/1996/.gitignore
new file mode 100644
index 000000000..0f3654a90
--- /dev/null
+++ b/1996/.gitignore
@@ -0,0 +1,4 @@
+#
+# sort with: sort -d -u
+mkentry
+mkentty.o
diff --git a/1996/august/.gitignore b/1996/august/.gitignore
index 13460ca2c..b74ec1c52 100644
--- a/1996/august/.gitignore
+++ b/1996/august/.gitignore
@@ -1,10 +1,14 @@
+#
+# sort with: sort -d -u
 august
 august.oc
-test.oo
-fac.oo
-parse.oo
-august.oc
-august.oo
 august.oo
 august.orig
+*.dSYM
+fac.oo
+indent
+indent.c
+indent.o
+parse.oo
 prog.orig
+test.oo
diff --git a/1996/dalbec/.gitignore b/1996/dalbec/.gitignore
index 465bc239b..b8ab10927 100644
--- a/1996/dalbec/.gitignore
+++ b/1996/dalbec/.gitignore
@@ -1,3 +1,9 @@
+#
+# sort with: sort -d -u
+*.dSYM
 dalbec
 dalbec.orig
+indent
+indent.c
+indent.o
 prog.orig
diff --git a/1996/eldby/.gitignore b/1996/eldby/.gitignore
index bfc768fda..ffbe0e491 100644
--- a/1996/eldby/.gitignore
+++ b/1996/eldby/.gitignore
@@ -1,4 +1,10 @@
+#
+# sort with: sort -d -u
+*.dSYM
 eldby
 eldby.alt
 eldby.orig
+indent
+indent.c
+indent.o
 prog.orig
diff --git a/1996/gandalf/.gitignore b/1996/gandalf/.gitignore
index 52f179143..a96a7f0d9 100644
--- a/1996/gandalf/.gitignore
+++ b/1996/gandalf/.gitignore
@@ -1,5 +1,11 @@
+#
+# sort with: sort -d -u
 cathat
+*.dSYM
 gandalf
-hatcat
 gandalf.orig
+hatcat
+indent
+indent.c
+indent.o
 prog.orig
diff --git a/1996/huffman/.gitignore b/1996/huffman/.gitignore
index edcf605cf..f91f01184 100644
--- a/1996/huffman/.gitignore
+++ b/1996/huffman/.gitignore
@@ -1,3 +1,9 @@
+#
+# sort with: sort -d -u
+*.dSYM
 huffman
 huffman.orig
+indent
+indent.c
+indent.o
 prog.orig
diff --git a/1996/jonth/.gitignore b/1996/jonth/.gitignore
index 92ff97b73..e64f3c374 100644
--- a/1996/jonth/.gitignore
+++ b/1996/jonth/.gitignore
@@ -1,3 +1,9 @@
+#
+# sort with: sort -d -u
+*.dSYM
+indent
+indent.c
+indent.o
 jonth
 jonth.orig
 prog.orig
diff --git a/1996/rcm/.gitignore b/1996/rcm/.gitignore
index 327ca9462..2d74aa8cf 100644
--- a/1996/rcm/.gitignore
+++ b/1996/rcm/.gitignore
@@ -1,3 +1,9 @@
+#
+# sort with: sort -d -u
+*.dSYM
+indent
+indent.c
+indent.o
+prog.orig
 rcm
 rcm.orig
-prog.orig
diff --git a/1996/schweikh1/.gitignore b/1996/schweikh1/.gitignore
index c75ce18e0..387e5ad5d 100644
--- a/1996/schweikh1/.gitignore
+++ b/1996/schweikh1/.gitignore
@@ -1,3 +1,9 @@
+#
+# sort with: sort -d -u
+*.dSYM
+indent
+indent.c
+indent.o
+prog.orig
 schweikh1
 schweikh1.orig
-prog.orig
diff --git a/1996/schweikh2/.gitignore b/1996/schweikh2/.gitignore
index 1a4299c79..0687e527f 100644
--- a/1996/schweikh2/.gitignore
+++ b/1996/schweikh2/.gitignore
@@ -1,3 +1,9 @@
+#
+# sort with: sort -d -u
+*.dSYM
+indent
+indent.c
+indent.o
+prog.orig
 schweikh2
 schweikh2.orig
-prog.orig
diff --git a/1996/schweikh3/.gitignore b/1996/schweikh3/.gitignore
index f9a41d6d3..3543743cf 100644
--- a/1996/schweikh3/.gitignore
+++ b/1996/schweikh3/.gitignore
@@ -1,3 +1,9 @@
+#
+# sort with: sort -d -u
+*.dSYM
+indent
+indent.c
+indent.o
+prog.orig
 schweikh3
 schweikh3.orig
-prog.orig
diff --git a/1996/westley/.gitignore b/1996/westley/.gitignore
index 9b69ec7c5..667dfb2a1 100644
--- a/1996/westley/.gitignore
+++ b/1996/westley/.gitignore
@@ -1,4 +1,10 @@
+#
+# sort with: sort -d -u
+*.dSYM
+indent
+indent.c
+indent.o
+prog.orig
 westley
 westley.alt
 westley.orig
-prog.orig
diff --git a/1998/.gitignore b/1998/.gitignore
new file mode 100644
index 000000000..0f3654a90
--- /dev/null
+++ b/1998/.gitignore
@@ -0,0 +1,4 @@
+#
+# sort with: sort -d -u
+mkentry
+mkentty.o
diff --git a/1998/banks/.gitignore b/1998/banks/.gitignore
index dd0262e55..fffee7493 100644
--- a/1998/banks/.gitignore
+++ b/1998/banks/.gitignore
@@ -1,4 +1,10 @@
+#
+# sort with: sort -d -u
 banks
 banks.alt
 banks.orig
+*.dSYM
+indent
+indent.c
+indent.o
 prog.orig
diff --git a/1998/bas1/.gitignore b/1998/bas1/.gitignore
index ce02bca67..e8fb3cee1 100644
--- a/1998/bas1/.gitignore
+++ b/1998/bas1/.gitignore
@@ -1,4 +1,10 @@
+#
+# sort with: sort -d -u
 bas1
 bas1.orig
 bemazing
+*.dSYM
+indent
+indent.c
+indent.o
 prog.orig
diff --git a/1998/bas2/.gitignore b/1998/bas2/.gitignore
index 568a89784..3dda0d686 100644
--- a/1998/bas2/.gitignore
+++ b/1998/bas2/.gitignore
@@ -1,3 +1,9 @@
+#
+# sort with: sort -d -u
 bas2
 bas2.orig
+*.dSYM
+indent
+indent.c
+indent.o
 prog.orig
diff --git a/1998/chaos/.gitignore b/1998/chaos/.gitignore
index e2f90f8c5..8a3066886 100644
--- a/1998/chaos/.gitignore
+++ b/1998/chaos/.gitignore
@@ -1,5 +1,11 @@
+#
+# sort with: sort -d -u
 chaos
 chaos_nohalf
 chaos_nohalf.c
 chaos.orig
+*.dSYM
+indent
+indent.c
+indent.o
 prog.orig
diff --git a/1998/df/.gitignore b/1998/df/.gitignore
index b35a35643..08ec0e5f2 100644
--- a/1998/df/.gitignore
+++ b/1998/df/.gitignore
@@ -1,3 +1,9 @@
+#
+# sort with: sort -d -u
+*.dSYM
 df
 df.orig
+indent
+indent.c
+indent.o
 prog.orig
diff --git a/1998/dlowe/.gitignore b/1998/dlowe/.gitignore
index 5855a6a26..98f903cfc 100644
--- a/1998/dlowe/.gitignore
+++ b/1998/dlowe/.gitignore
@@ -1,6 +1,12 @@
+#
+# sort with: sort -d -u
+README.poot.md
+*.dSYM
 dlowe
 dlowe.alt
-README.poot.md
 dlowe.orig
-prog.orig
+indent
+indent.c
+indent.o
 make.1
+prog.orig
diff --git a/1998/dloweneil/.gitignore b/1998/dloweneil/.gitignore
index 67199b242..e5ae1b222 100644
--- a/1998/dloweneil/.gitignore
+++ b/1998/dloweneil/.gitignore
@@ -1,6 +1,12 @@
+#
+# sort with: sort -d -u
+*.dSYM
 dloweneil
 dloweneil.alt
+dloweneil.orig
+indent
+indent.c
+indent.o
 pootris
 pootris.alt
-dloweneil.orig
 prog.orig
diff --git a/1998/dorssel/.gitignore b/1998/dorssel/.gitignore
index 5e82ae813..f691c7d63 100644
--- a/1998/dorssel/.gitignore
+++ b/1998/dorssel/.gitignore
@@ -1,3 +1,9 @@
+#
+# sort with: sort -d -u
+*.dSYM
 dorssel
 dorssel.orig
+indent
+indent.c
+indent.o
 prog.orig
diff --git a/1998/fanf/.gitignore b/1998/fanf/.gitignore
index 40e42a6a6..81c3c4405 100644
--- a/1998/fanf/.gitignore
+++ b/1998/fanf/.gitignore
@@ -1,7 +1,13 @@
+#
+# sort with: sort -d -u
+*.dSYM
 fanf
-fanftmp1.c
-fanftmp1
-fanftmp2.c
-fanftmp2
 fanf.orig
+fanftmp1
+fanftmp1.c
+fanftmp2
+fanftmp2.c
+indent
+indent.c
+indent.o
 prog.orig
diff --git a/1998/schnitzi/.gitignore b/1998/schnitzi/.gitignore
index 724675963..5209c500d 100644
--- a/1998/schnitzi/.gitignore
+++ b/1998/schnitzi/.gitignore
@@ -1,6 +1,12 @@
+#
+# sort with: sort -d -u
+*.dSYM
 data
+indent
+indent.c
+indent.o
+prog.orig
 schnitzi
+schnitzi.orig
 sort
 sort.c
-schnitzi.orig
-prog.orig
diff --git a/1998/schweikh1/.gitignore b/1998/schweikh1/.gitignore
index a53a9fe4e..4fef010e7 100644
--- a/1998/schweikh1/.gitignore
+++ b/1998/schweikh1/.gitignore
@@ -1,4 +1,10 @@
+#
+# sort with: sort -d -u
+*.dSYM
+indent
+indent.c
+indent.o
+prog.orig
 schweikh1
 schweikh1.alt
 schweikh1.orig
-prog.orig
diff --git a/1998/schweikh2/.gitignore b/1998/schweikh2/.gitignore
index a429b75a1..e541e6835 100644
--- a/1998/schweikh2/.gitignore
+++ b/1998/schweikh2/.gitignore
@@ -1,4 +1,10 @@
+#
+# sort with: sort -d -u
+*.dSYM
+indent
+indent.c
+indent.o
+prog.orig
 schweikh2
 schweikh2.orig
-prog.orig
 yarng
diff --git a/1998/schweikh3/.gitignore b/1998/schweikh3/.gitignore
index 289578d6f..5e2e8803f 100644
--- a/1998/schweikh3/.gitignore
+++ b/1998/schweikh3/.gitignore
@@ -1,9 +1,15 @@
-schweikh3
-schweikh3.alt
+#
+# sort with: sort -d -u
+*.dSYM
 file1
 file2
 file3
 file4
-schweikh3.orig
-samefile
+indent
+indent.c
+indent.o
 prog.orig
+samefile
+schweikh3
+schweikh3.alt
+schweikh3.orig
diff --git a/1998/tomtorfs/.gitignore b/1998/tomtorfs/.gitignore
index 6c7c8493d..ec426bfe5 100644
--- a/1998/tomtorfs/.gitignore
+++ b/1998/tomtorfs/.gitignore
@@ -1,3 +1,9 @@
+#
+# sort with: sort -d -u
+*.dSYM
+indent
+indent.c
+indent.o
+prog.orig
 tomtorfs
 tomtorfs.orig
-prog.orig
diff --git a/2000/.gitignore b/2000/.gitignore
new file mode 100644
index 000000000..0f3654a90
--- /dev/null
+++ b/2000/.gitignore
@@ -0,0 +1,4 @@
+#
+# sort with: sort -d -u
+mkentry
+mkentty.o
diff --git a/2000/anderson/.gitignore b/2000/anderson/.gitignore
index 59359d658..574cdacb9 100644
--- a/2000/anderson/.gitignore
+++ b/2000/anderson/.gitignore
@@ -1,4 +1,10 @@
+#
+# sort with: sort -d -u
 anderson
 anderson.alt
 anderson.orig
+*.dSYM
+indent
+indent.c
+indent.o
 prog.orig
diff --git a/2000/bellard/.gitignore b/2000/bellard/.gitignore
index d10adb731..f902e995a 100644
--- a/2000/bellard/.gitignore
+++ b/2000/bellard/.gitignore
@@ -1,3 +1,9 @@
+#
+# sort with: sort -d -u
 bellard
 bellard.orig
+*.dSYM
+indent
+indent.c
+indent.o
 prog.orig
diff --git a/2000/bmeyer/.gitignore b/2000/bmeyer/.gitignore
index bed667efc..22cce140f 100644
--- a/2000/bmeyer/.gitignore
+++ b/2000/bmeyer/.gitignore
@@ -1,6 +1,12 @@
+#
+# sort with: sort -d -u
 bmeyer
 bmeyer.orig
+*.dSYM
 glicbawls
+indent
+indent.c
+indent.o
 lavabus.glic
 lavabus.glic2
 lenna.pgm
diff --git a/2000/briddlebane/.gitignore b/2000/briddlebane/.gitignore
index edb470ee9..cd5094523 100644
--- a/2000/briddlebane/.gitignore
+++ b/2000/briddlebane/.gitignore
@@ -1,3 +1,9 @@
+#
+# sort with: sort -d -u
 briddlebane
 briddlebane.orig
+*.dSYM
+indent
+indent.c
+indent.o
 prog.orig
diff --git a/2000/dhyang/.gitignore b/2000/dhyang/.gitignore
index d1bf90d0a..a7431b8d6 100644
--- a/2000/dhyang/.gitignore
+++ b/2000/dhyang/.gitignore
@@ -1,10 +1,16 @@
+#
+# sort with: sort -d -u
 aku
 aku.c
+*.dSYM
 dhyang
+dhyang.orig
+indent
+indent.c
+indent.o
+prog.orig
 saitou
 soku
 soku.c
 zan
 zan.c
-dhyang.orig
-prog.orig
diff --git a/2000/dlowe/.gitignore b/2000/dlowe/.gitignore
index 54b04a50b..915bce873 100644
--- a/2000/dlowe/.gitignore
+++ b/2000/dlowe/.gitignore
@@ -1,3 +1,9 @@
+#
+# sort with: sort -d -u
+*.dSYM
 dlowe
 dlowe.orig
+indent
+indent.c
+indent.o
 prog.orig
diff --git a/2000/jarijyrki/.gitignore b/2000/jarijyrki/.gitignore
index b8281f615..04262e1a8 100644
--- a/2000/jarijyrki/.gitignore
+++ b/2000/jarijyrki/.gitignore
@@ -1,5 +1,11 @@
+#
+# sort with: sort -d -u
+*.dSYM
+indent
+indent.c
+indent.o
 jarijyrki
+jarijyrki.orig
 myedits.info
 outfile.info
-jarijyrki.orig
 prog.orig
diff --git a/2000/natori/.gitignore b/2000/natori/.gitignore
index 741f171b6..31aa184cb 100644
--- a/2000/natori/.gitignore
+++ b/2000/natori/.gitignore
@@ -1,3 +1,9 @@
+#
+# sort with: sort -d -u
+*.dSYM
+indent
+indent.c
+indent.o
 natori
 natori.alt
 natori.orig
diff --git a/2000/primenum/.gitignore b/2000/primenum/.gitignore
index 8efa69eac..a475c9d80 100644
--- a/2000/primenum/.gitignore
+++ b/2000/primenum/.gitignore
@@ -1,3 +1,9 @@
+#
+# sort with: sort -d -u
+*.dSYM
+indent
+indent.c
+indent.o
 primenum
 primenum.orig
 prog.orig
diff --git a/2000/rince/.gitignore b/2000/rince/.gitignore
index 63efe381e..fedd2c5a6 100644
--- a/2000/rince/.gitignore
+++ b/2000/rince/.gitignore
@@ -1,4 +1,10 @@
+#
+# sort with: sort -d -u
+*.dSYM
 dmy2jd
+indent
+indent.c
+indent.o
+prog.orig
 rince
 rince.orig
-prog.orig
diff --git a/2000/robison/.gitignore b/2000/robison/.gitignore
index 672ba4f0c..4fdea5695 100644
--- a/2000/robison/.gitignore
+++ b/2000/robison/.gitignore
@@ -1,3 +1,9 @@
+#
+# sort with: sort -d -u
+*.dSYM
+indent
+indent.c
+indent.o
+prog.orig
 robison
 robison.orig
-prog.orig
diff --git a/2000/schneiderwent/.gitignore b/2000/schneiderwent/.gitignore
index d91a3e358..9c7976ca7 100644
--- a/2000/schneiderwent/.gitignore
+++ b/2000/schneiderwent/.gitignore
@@ -1,3 +1,9 @@
+#
+# sort with: sort -d -u
+*.dSYM
+indent
+indent.c
+indent.o
+prog.orig
 schneiderwent
 schneiderwent.orig
-prog.orig
diff --git a/2000/thadgavin/.gitignore b/2000/thadgavin/.gitignore
index 60d3d8955..abe1bf4ad 100644
--- a/2000/thadgavin/.gitignore
+++ b/2000/thadgavin/.gitignore
@@ -1,6 +1,12 @@
+#
+# sort with: sort -d -u
+*.dSYM
+indent
+indent.c
+indent.o
+prog.orig
 thadgavin
-thadgavin_sdl
 thadgavin.alt
 thadgavin.alt_sdl
 thadgavin.orig
-prog.orig
+thadgavin_sdl
diff --git a/2000/tomx/.gitignore b/2000/tomx/.gitignore
index 0bec0a937..a3aac5149 100644
--- a/2000/tomx/.gitignore
+++ b/2000/tomx/.gitignore
@@ -1,5 +1,11 @@
+#
+# sort with: sort -d -u
+*.dSYM
+indent
+indent.c
+indent.o
+mkentry
+prog.orig
 tomx
 tomx.alt
-mkentry
 tomx.orig
-prog.orig
diff --git a/2001/.gitignore b/2001/.gitignore
new file mode 100644
index 000000000..0f3654a90
--- /dev/null
+++ b/2001/.gitignore
@@ -0,0 +1,4 @@
+#
+# sort with: sort -d -u
+mkentry
+mkentty.o
diff --git a/2001/anonymous/.gitignore b/2001/anonymous/.gitignore
index 1383fb0fd..feb3ed8a4 100644
--- a/2001/anonymous/.gitignore
+++ b/2001/anonymous/.gitignore
@@ -1,12 +1,18 @@
+#
+# sort with: sort -d -u
 anonymous
+anonymous.bed
+anonymous.bed.64
+anonymous.orig
 anonymous.ten
 anonymous.ten.32
+anonymous.ten.64
+*.dSYM
+indent
+indent.c
+indent.o
+prog.orig
 ten.bak.od
 ten.bak.txt
 ten.od
 ten.txt
-anonymous.ten.64
-anonymous.bed
-anonymous.bed.64
-anonymous.orig
-prog.orig
diff --git a/2001/bellard/.gitignore b/2001/bellard/.gitignore
index f79aeb398..d488e0c8e 100644
--- a/2001/bellard/.gitignore
+++ b/2001/bellard/.gitignore
@@ -1,5 +1,11 @@
+#
+# sort with: sort -d -u
 bellard
-bellard.otccex
-otccelf
 bellard.orig
+bellard.otccex
+*.dSYM
+indent
+indent.c
+indent.o
+otccelf
 prog.orig
diff --git a/2001/cheong/.gitignore b/2001/cheong/.gitignore
index 0d0e1bdef..81530637c 100644
--- a/2001/cheong/.gitignore
+++ b/2001/cheong/.gitignore
@@ -1,3 +1,9 @@
+#
+# sort with: sort -d -u
 cheong
 cheong.orig
+*.dSYM
+indent
+indent.c
+indent.o
 prog.orig
diff --git a/2001/coupard/.gitignore b/2001/coupard/.gitignore
index 6b6aea6ab..a0a9f50c6 100644
--- a/2001/coupard/.gitignore
+++ b/2001/coupard/.gitignore
@@ -1,4 +1,10 @@
+#
+# sort with: sort -d -u
 coupard
-test.wav
 coupard.orig
+*.dSYM
+indent
+indent.c
+indent.o
 prog.orig
+test.wav
diff --git a/2001/ctk/.gitignore b/2001/ctk/.gitignore
index e74cd6e9d..4d7fe01ef 100644
--- a/2001/ctk/.gitignore
+++ b/2001/ctk/.gitignore
@@ -1,3 +1,9 @@
+#
+# sort with: sort -d -u
 ctk
 ctk.orig
+*.dSYM
+indent
+indent.c
+indent.o
 prog.orig
diff --git a/2001/dgbeards/.gitignore b/2001/dgbeards/.gitignore
index 89f71e0ef..d23e575db 100644
--- a/2001/dgbeards/.gitignore
+++ b/2001/dgbeards/.gitignore
@@ -1,4 +1,10 @@
+#
+# sort with: sort -d -u
+*.dSYM
 dgbeards
 dgbeards.alt
 dgbeards.orig
+indent
+indent.c
+indent.o
 prog.orig
diff --git a/2001/herrmann1/.gitignore b/2001/herrmann1/.gitignore
index 867ac8a4d..8f801c8e9 100644
--- a/2001/herrmann1/.gitignore
+++ b/2001/herrmann1/.gitignore
@@ -1,6 +1,12 @@
-herrmann1
+#
+# sort with: sort -d -u
+*.dSYM
 error
+herrmann1
 herrmann1-1.c
 herrmann1-3.c
 herrmann1.orig
+indent
+indent.c
+indent.o
 prog.orig
diff --git a/2001/herrmann2/.gitignore b/2001/herrmann2/.gitignore
index b70087acc..95bc4a179 100644
--- a/2001/herrmann2/.gitignore
+++ b/2001/herrmann2/.gitignore
@@ -1,7 +1,13 @@
-herrmann2
-herrmann2.orig
-prog.orig
-ioccc.out
-ioccc.out2
+#
+# sort with: sort -d -u
 cup.out
 cup.out2
+*.dSYM
+herrmann2
+herrmann2.orig
+indent
+indent.c
+indent.o
+ioccc.out
+ioccc.out2
+prog.orig
diff --git a/2001/jason/.gitignore b/2001/jason/.gitignore
index 54c1cfc1f..cd668eff0 100644
--- a/2001/jason/.gitignore
+++ b/2001/jason/.gitignore
@@ -1,3 +1,9 @@
+#
+# sort with: sort -d -u
+*.dSYM
+indent
+indent.c
+indent.o
 jason
 jason.orig
 prog.orig
diff --git a/2001/kev/.gitignore b/2001/kev/.gitignore
index 97e85fc4c..e14fac835 100644
--- a/2001/kev/.gitignore
+++ b/2001/kev/.gitignore
@@ -1,3 +1,9 @@
+#
+# sort with: sort -d -u
+*.dSYM
+indent
+indent.c
+indent.o
 kev
 kev.alt
 kev.orig
diff --git a/2001/ollinger/.gitignore b/2001/ollinger/.gitignore
index 47576f34b..f49b1d880 100644
--- a/2001/ollinger/.gitignore
+++ b/2001/ollinger/.gitignore
@@ -1,3 +1,9 @@
+#
+# sort with: sort -d -u
+*.dSYM
+indent
+indent.c
+indent.o
 ollinger
 ollinger.orig
 prog.orig
diff --git a/2001/rosten/.gitignore b/2001/rosten/.gitignore
index f7cf44c80..85fe1eaf6 100644
--- a/2001/rosten/.gitignore
+++ b/2001/rosten/.gitignore
@@ -1,3 +1,9 @@
+#
+# sort with: sort -d -u
+*.dSYM
+indent
+indent.c
+indent.o
+prog.orig
 rosten
 rosten.orig
-prog.orig
diff --git a/2001/schweikh/.gitignore b/2001/schweikh/.gitignore
index e2bf902fa..bacaa45ee 100644
--- a/2001/schweikh/.gitignore
+++ b/2001/schweikh/.gitignore
@@ -1,3 +1,9 @@
+#
+# sort with: sort -d -u
+*.dSYM
+indent
+indent.c
+indent.o
+prog.orig
 schweikh
 schweikh.orig
-prog.orig
diff --git a/2001/westley/.gitignore b/2001/westley/.gitignore
index c20112503..cd40d775e 100644
--- a/2001/westley/.gitignore
+++ b/2001/westley/.gitignore
@@ -1,8 +1,14 @@
+#
+# sort with: sort -d -u
+*.dSYM
+indent
+indent.c
+indent.o
+prog.orig
 westley
-westley.alt
 westley2
 westley2.c
+westley.alt
+westley.orig
 westley.punch
 westley.sort
-westley.orig
-prog.orig
diff --git a/2001/williams/.gitignore b/2001/williams/.gitignore
index 853339539..407792797 100644
--- a/2001/williams/.gitignore
+++ b/2001/williams/.gitignore
@@ -1,3 +1,9 @@
+#
+# sort with: sort -d -u
+*.dSYM
+indent
+indent.c
+indent.o
+prog.orig
 williams
 williams.orig
-prog.orig
diff --git a/2004/.gitignore b/2004/.gitignore
new file mode 100644
index 000000000..0f3654a90
--- /dev/null
+++ b/2004/.gitignore
@@ -0,0 +1,4 @@
+#
+# sort with: sort -d -u
+mkentry
+mkentty.o
diff --git a/2004/anonymous/.gitignore b/2004/anonymous/.gitignore
index 04d661f08..8ded6c07c 100644
--- a/2004/anonymous/.gitignore
+++ b/2004/anonymous/.gitignore
@@ -1,6 +1,12 @@
+#
+# sort with: sort -d -u
 anonymous
-anonymous.pgm
-precious.pgm
-ring.pgm
 anonymous.orig
+anonymous.pgm
+*.dSYM
+indent
+indent.c
+indent.o
+precious.pgm
 prog.orig
+ring.pgm
diff --git a/2004/arachnid/.gitignore b/2004/arachnid/.gitignore
index 3fb94c2ed..fda22a710 100644
--- a/2004/arachnid/.gitignore
+++ b/2004/arachnid/.gitignore
@@ -1,4 +1,10 @@
+#
+# sort with: sort -d -u
 arachnid
 arachnid.alt
 arachnid.orig
+*.dSYM
+indent
+indent.c
+indent.o
 prog.orig
diff --git a/2004/burley/.gitignore b/2004/burley/.gitignore
index 355de6257..b52508413 100644
--- a/2004/burley/.gitignore
+++ b/2004/burley/.gitignore
@@ -1,3 +1,9 @@
+#
+# sort with: sort -d -u
 burley
 burley.orig
+*.dSYM
+indent
+indent.c
+indent.o
 prog.orig
diff --git a/2004/gavare/.gitignore b/2004/gavare/.gitignore
index baca81e1f..541089995 100644
--- a/2004/gavare/.gitignore
+++ b/2004/gavare/.gitignore
@@ -1,7 +1,13 @@
+#
+# sort with: sort -d -u
+*.dSYM
 gavare
 gavare.alt
 gavare.alt2
-ioccc_ray.ppm
-gavare.r3
 gavare.orig
+gavare.r3
+indent
+indent.c
+indent.o
+ioccc_ray.ppm
 prog.orig
diff --git a/2004/gavin/.gitignore b/2004/gavin/.gitignore
index fa82baa66..66a9cda9a 100644
--- a/2004/gavin/.gitignore
+++ b/2004/gavin/.gitignore
@@ -1,14 +1,20 @@
+#
+# sort with: sort -d -u
+*.dSYM
 fs/
 fs.tar
 gavin
-gavin.alt.o
 gavin.alt
+gavin.alt.o
 gavin.o
+gavin.orig
+img/README.md
 img/gavin.c
 img/prim
-img/README.md
+indent
+indent.c
+indent.o
 kernel
+prog.orig
 sh
 vi
-gavin.orig
-prog.orig
diff --git a/2004/hibachi/.gitignore b/2004/hibachi/.gitignore
index 0530f2f29..37024c686 100644
--- a/2004/hibachi/.gitignore
+++ b/2004/hibachi/.gitignore
@@ -1,7 +1,13 @@
+#
+# sort with: sort -d -u
 build
+*.dSYM
+hibachi.orig
+indent
+indent.c
+indent.o
+prog.orig
 src/config.log
 src/config.status
 src/hibachi
 src/makefile
-hibachi.orig
-prog.orig
diff --git a/2004/hoyle/.gitignore b/2004/hoyle/.gitignore
index 8e990d0ea..ca6a85851 100644
--- a/2004/hoyle/.gitignore
+++ b/2004/hoyle/.gitignore
@@ -1,4 +1,10 @@
+#
+# sort with: sort -d -u
+*.dSYM
 hoyle
 hoyle.alt
 hoyle.orig
+indent
+indent.c
+indent.o
 prog.orig
diff --git a/2004/jdalbec/.gitignore b/2004/jdalbec/.gitignore
index a10a1afff..27746489d 100644
--- a/2004/jdalbec/.gitignore
+++ b/2004/jdalbec/.gitignore
@@ -1,8 +1,14 @@
+#
+# sort with: sort -d -u
+*.dSYM
+indent
+indent.c
+indent.o
 jdalbec
+jdalbec2.alt.c
 jdalbec2.c
+jdalbec3.alt.c
 jdalbec3.c
+jdalbec.alt
 jdalbec.orig
 prog.orig
-jdalbec3.alt.c
-jdalbec2.alt.c
-jdalbec.alt
diff --git a/2004/kopczynski/.gitignore b/2004/kopczynski/.gitignore
index 5851315ba..306310548 100644
--- a/2004/kopczynski/.gitignore
+++ b/2004/kopczynski/.gitignore
@@ -1,3 +1,9 @@
+#
+# sort with: sort -d -u
+*.dSYM
+indent
+indent.c
+indent.o
 kopczynski
 kopczynski.alt
 kopczynski.orig
diff --git a/2004/newbern/.gitignore b/2004/newbern/.gitignore
index e231579e4..c516dd742 100644
--- a/2004/newbern/.gitignore
+++ b/2004/newbern/.gitignore
@@ -1,3 +1,9 @@
+#
+# sort with: sort -d -u
+*.dSYM
+indent
+indent.c
+indent.o
 newbern
 newbern.orig
 prog.orig
diff --git a/2004/omoikane/.gitignore b/2004/omoikane/.gitignore
index ee2c7dd64..ec0cbf1a4 100644
--- a/2004/omoikane/.gitignore
+++ b/2004/omoikane/.gitignore
@@ -1,3 +1,9 @@
+#
+# sort with: sort -d -u
+*.dSYM
+indent
+indent.c
+indent.o
 omoikane
 omoikane.orig
 prog.orig
diff --git a/2004/schnitzi/.gitignore b/2004/schnitzi/.gitignore
index 8eb45f60f..cd8a76fb0 100644
--- a/2004/schnitzi/.gitignore
+++ b/2004/schnitzi/.gitignore
@@ -1,3 +1,9 @@
+#
+# sort with: sort -d -u
+*.dSYM
+indent
+indent.c
+indent.o
+prog.orig
 schnitzi
 schnitzi.orig
-prog.orig
diff --git a/2004/sds/.gitignore b/2004/sds/.gitignore
index 1b11600de..c9a6612c6 100644
--- a/2004/sds/.gitignore
+++ b/2004/sds/.gitignore
@@ -1,11 +1,17 @@
-sds
+#
+# sort with: sort -d -u
+*.dSYM
 encoder
 encoder.c
+indent
+indent.c
+indent.o
 message
+prog.orig
+remarks.md
+sds
 sds2_msg
 sds2_msg.c
 sds_msg
 sds_msg.c
 sds.orig
-prog.orig
-remarks.md
diff --git a/2004/vik1/.gitignore b/2004/vik1/.gitignore
index 73675e107..bac5d95bb 100644
--- a/2004/vik1/.gitignore
+++ b/2004/vik1/.gitignore
@@ -1,3 +1,9 @@
+#
+# sort with: sort -d -u
+*.dSYM
+indent
+indent.c
+indent.o
+prog.orig
 vik1
 vik1.orig
-prog.orig
diff --git a/2004/vik2/.gitignore b/2004/vik2/.gitignore
index 9e7400974..cade6acc2 100644
--- a/2004/vik2/.gitignore
+++ b/2004/vik2/.gitignore
@@ -1,6 +1,12 @@
+#
+# sort with: sort -d -u
 cat-killing-curiosity
+*.dSYM
+indent
+indent.c
+indent.o
+prog.orig
 vik2
+vik2.orig
 vik2.possible.cat.death_1.c
 vik2.possible.cat.death_2.c
-vik2.orig
-prog.orig
diff --git a/2005/aidan/.gitignore b/2005/aidan/.gitignore
index c0bba9c5d..8415bc2fb 100644
--- a/2005/aidan/.gitignore
+++ b/2005/aidan/.gitignore
@@ -1,4 +1,10 @@
+#
+# sort with: sort -d -u
 aidan
 aidan.alt
 aidan.orig
+*.dSYM
+indent
+indent.c
+indent.o
 prog.orig
diff --git a/2005/anon/.gitignore b/2005/anon/.gitignore
index eb7dd02c1..4d3940e3d 100644
--- a/2005/anon/.gitignore
+++ b/2005/anon/.gitignore
@@ -1,4 +1,10 @@
+#
+# sort with: sort -d -u
 anon
 anon.alt
 anon.orig
+*.dSYM
+indent
+indent.c
+indent.o
 prog.orig
diff --git a/2005/boutines/.gitignore b/2005/boutines/.gitignore
index 7d028a28a..ff6b7cffd 100644
--- a/2005/boutines/.gitignore
+++ b/2005/boutines/.gitignore
@@ -1,6 +1,12 @@
+#
+# sort with: sort -d -u
 boutines
-test.svg
-test.png
 boutines.orig
+*.dSYM
+indent
+indent.c
+indent.o
 prog.orig
 result.svg
+test.png
+test.svg
diff --git a/2005/chia/.gitignore b/2005/chia/.gitignore
index 9ae6d5e73..6ceb008a0 100644
--- a/2005/chia/.gitignore
+++ b/2005/chia/.gitignore
@@ -1,3 +1,9 @@
+#
+# sort with: sort -d -u
 chia
 chia.orig
+*.dSYM
+indent
+indent.c
+indent.o
 prog.orig
diff --git a/2005/giljade/.gitignore b/2005/giljade/.gitignore
index da5de6a7c..4d18f8ed2 100644
--- a/2005/giljade/.gitignore
+++ b/2005/giljade/.gitignore
@@ -1,6 +1,12 @@
-giljade
-out
-c.c
+#
+# sort with: sort -d -u
 c
+c.c
+*.dSYM
+giljade
 giljade.orig
+indent
+indent.c
+indent.o
+out
 prog.orig
diff --git a/2005/jetro/.gitignore b/2005/jetro/.gitignore
index 7d3f40e7d..527f9c169 100644
--- a/2005/jetro/.gitignore
+++ b/2005/jetro/.gitignore
@@ -1,3 +1,9 @@
+#
+# sort with: sort -d -u
+*.dSYM
+indent
+indent.c
+indent.o
 jetro
 jetro.orig
 prog.orig
diff --git a/2005/klausler/.gitignore b/2005/klausler/.gitignore
index 523e95fc4..a5427af87 100644
--- a/2005/klausler/.gitignore
+++ b/2005/klausler/.gitignore
@@ -1,4 +1,10 @@
+#
+# sort with: sort -d -u
+*.dSYM
 dict.h
+indent
+indent.c
+indent.o
 klausler
 klausler.orig
 prog.orig
diff --git a/2005/mikeash/.gitignore b/2005/mikeash/.gitignore
index b4be26601..cbb057f80 100644
--- a/2005/mikeash/.gitignore
+++ b/2005/mikeash/.gitignore
@@ -1,5 +1,11 @@
+#
+# sort with: sort -d -u
+*.dSYM
+indent
+indent.c
+indent.o
 mikeash
-mikeash.orig
 mikeash2
 mikeash2.c
+mikeash.orig
 prog.orig
diff --git a/2005/mynx/.gitignore b/2005/mynx/.gitignore
index 3dfe0da2f..a8a6d8214 100644
--- a/2005/mynx/.gitignore
+++ b/2005/mynx/.gitignore
@@ -1,6 +1,12 @@
+#
+# sort with: sort -d -u
+*.dSYM
+indent
+indent.c
+indent.o
 mynx
 mynx.alt
-source/config.*
-source/makefile
 mynx.orig
 prog.orig
+source/config.*
+source/makefile
diff --git a/2005/persano/.gitignore b/2005/persano/.gitignore
index f507bb94a..b47eaf316 100644
--- a/2005/persano/.gitignore
+++ b/2005/persano/.gitignore
@@ -1,4 +1,10 @@
-persano
+#
+# sort with: sort -d -u
+*.dSYM
 foo.gif
+indent
+indent.c
+indent.o
+persano
 persano.orig
 prog.orig
diff --git a/2005/sykes/.gitignore b/2005/sykes/.gitignore
index 0aae24dc3..eb1d8ded2 100644
--- a/2005/sykes/.gitignore
+++ b/2005/sykes/.gitignore
@@ -1,5 +1,11 @@
-pet.rom
-sykes
+#
+# sort with: sort -d -u
+*.dSYM
 dungeon.prg
-sykes.orig
+indent
+indent.c
+indent.o
+pet.rom
 prog.orig
+sykes
+sykes.orig
diff --git a/2005/timwi/.gitignore b/2005/timwi/.gitignore
index 33e1966e3..f7c1bdfd4 100644
--- a/2005/timwi/.gitignore
+++ b/2005/timwi/.gitignore
@@ -1,3 +1,9 @@
+#
+# sort with: sort -d -u
+*.dSYM
+indent
+indent.c
+indent.o
+prog.orig
 timwi
 timwi.orig
-prog.orig
diff --git a/2005/toledo/.gitignore b/2005/toledo/.gitignore
index dfb8b6ed3..d49a81f93 100644
--- a/2005/toledo/.gitignore
+++ b/2005/toledo/.gitignore
@@ -1,5 +1,11 @@
+#
+# sort with: sort -d -u
+*.dSYM
+indent
+indent.c
+indent.o
+prog.orig
 toledo
 toledo2
 toledo3
 toledo.orig
-prog.orig
diff --git a/2005/vik/.gitignore b/2005/vik/.gitignore
index a699e986c..ed71fc17a 100644
--- a/2005/vik/.gitignore
+++ b/2005/vik/.gitignore
@@ -1,3 +1,9 @@
+#
+# sort with: sort -d -u
+*.dSYM
+indent
+indent.c
+indent.o
+prog.orig
 vik
 vik.orig
-prog.orig
diff --git a/2005/vince/.gitignore b/2005/vince/.gitignore
index 9ed3297f5..aa45c9710 100644
--- a/2005/vince/.gitignore
+++ b/2005/vince/.gitignore
@@ -1,4 +1,10 @@
+#
+# sort with: sort -d -u
+*.dSYM
+indent
+indent.c
+indent.o
+prog.orig
 vince
 vince.alt
 vince.orig
-prog.orig
diff --git a/2006/birken/.gitignore b/2006/birken/.gitignore
index ea1806581..196c8cd91 100644
--- a/2006/birken/.gitignore
+++ b/2006/birken/.gitignore
@@ -1,3 +1,9 @@
+#
+# sort with: sort -d -u
 birken
 birken.orig
+*.dSYM
+indent
+indent.c
+indent.o
 prog.orig
diff --git a/2006/borsanyi/.gitignore b/2006/borsanyi/.gitignore
index bfa23e129..1c6b1a052 100644
--- a/2006/borsanyi/.gitignore
+++ b/2006/borsanyi/.gitignore
@@ -1,4 +1,10 @@
+#
+# sort with: sort -d -u
 borsanyi
-example.gif
 borsanyi.orig
+*.dSYM
+example.gif
+indent
+indent.c
+indent.o
 prog.orig
diff --git a/2006/grothe/.gitignore b/2006/grothe/.gitignore
index d8e4e2a3e..703fe23fb 100644
--- a/2006/grothe/.gitignore
+++ b/2006/grothe/.gitignore
@@ -1,3 +1,9 @@
+#
+# sort with: sort -d -u
+*.dSYM
 grothe
 grothe.orig
+indent
+indent.c
+indent.o
 prog.orig
diff --git a/2006/hamre/.gitignore b/2006/hamre/.gitignore
index 243895e30..c86de6679 100644
--- a/2006/hamre/.gitignore
+++ b/2006/hamre/.gitignore
@@ -1,3 +1,9 @@
+#
+# sort with: sort -d -u
+*.dSYM
 hamre
 hamre.orig
+indent
+indent.c
+indent.o
 prog.orig
diff --git a/2006/meyer/.gitignore b/2006/meyer/.gitignore
index 76ec446fd..95e5c53a1 100644
--- a/2006/meyer/.gitignore
+++ b/2006/meyer/.gitignore
@@ -1,3 +1,9 @@
+#
+# sort with: sort -d -u
+*.dSYM
+indent
+indent.c
+indent.o
 meyer
 meyer.orig
 prog.orig
diff --git a/2006/monge/.gitignore b/2006/monge/.gitignore
index bb2b24faf..83dc98f1e 100644
--- a/2006/monge/.gitignore
+++ b/2006/monge/.gitignore
@@ -1,3 +1,9 @@
+#
+# sort with: sort -d -u
+*.dSYM
+indent
+indent.c
+indent.o
 monge
 monge.alt
 monge.orig
diff --git a/2006/night/.gitignore b/2006/night/.gitignore
index 2a6349817..5a86d7da7 100644
--- a/2006/night/.gitignore
+++ b/2006/night/.gitignore
@@ -1,3 +1,9 @@
+#
+# sort with: sort -d -u
+*.dSYM
+indent
+indent.c
+indent.o
 night
 night.alt
 night.orig
diff --git a/2006/sloane/.gitignore b/2006/sloane/.gitignore
index 4ee5cfff9..487df6b8e 100644
--- a/2006/sloane/.gitignore
+++ b/2006/sloane/.gitignore
@@ -1,4 +1,10 @@
+#
+# sort with: sort -d -u
+*.dSYM
+indent
+indent.c
+indent.o
+prog.orig
 sloane
 sloane.alt
 sloane.orig
-prog.orig
diff --git a/2006/stewart/.gitignore b/2006/stewart/.gitignore
index 804342c6f..cff19d76e 100644
--- a/2006/stewart/.gitignore
+++ b/2006/stewart/.gitignore
@@ -1,6 +1,12 @@
+#
+# sort with: sort -d -u
+*.dSYM
+indent
+indent.c
+indent.o
+*.png
+prog.orig
 stewart
 stewart.html
-*.xbm
-*.png
 stewart.orig
-prog.orig
+*.xbm
diff --git a/2006/sykes1/.gitignore b/2006/sykes1/.gitignore
index e4c88413f..622f24c46 100644
--- a/2006/sykes1/.gitignore
+++ b/2006/sykes1/.gitignore
@@ -1,9 +1,15 @@
+#
+# sort with: sort -d -u
 cube.gif
-sykes1
-sykes1.html
-sykes1.orig
+*.dSYM
+indent
+indent.c
+indent.o
 prog.orig
-sykes1.out
-sykes1.alt.out
+sykes1
 sykes1.alt
 sykes1.alt.html
+sykes1.alt.out
+sykes1.html
+sykes1.orig
+sykes1.out
diff --git a/2006/sykes2/.gitignore b/2006/sykes2/.gitignore
index 12c232841..11cca1812 100644
--- a/2006/sykes2/.gitignore
+++ b/2006/sykes2/.gitignore
@@ -1,3 +1,9 @@
+#
+# sort with: sort -d -u
+*.dSYM
+indent
+indent.c
+indent.o
+prog.orig
 sykes2
 sykes2.orig
-prog.orig
diff --git a/2006/toledo1/.gitignore b/2006/toledo1/.gitignore
index 339de65ac..ef5533e0c 100644
--- a/2006/toledo1/.gitignore
+++ b/2006/toledo1/.gitignore
@@ -1,3 +1,9 @@
+#
+# sort with: sort -d -u
+*.dSYM
+indent
+indent.c
+indent.o
+prog.orig
 toledo1
 toledo1.orig
-prog.orig
diff --git a/2006/toledo2/.gitignore b/2006/toledo2/.gitignore
index c29cc301c..e9a643325 100644
--- a/2006/toledo2/.gitignore
+++ b/2006/toledo2/.gitignore
@@ -1,5 +1,11 @@
+#
+# sort with: sort -d -u
+C
+*.dSYM
+indent
+indent.c
+indent.o
+prog.orig
 toledo2
 toledo2.alt
 toledo2.orig
-prog.orig
-C
diff --git a/2006/toledo3/.gitignore b/2006/toledo3/.gitignore
index b6ef4194a..a9af3441b 100644
--- a/2006/toledo3/.gitignore
+++ b/2006/toledo3/.gitignore
@@ -1,5 +1,11 @@
+#
+# sort with: sort -d -u
+*.dSYM
+indent
+indent.c
+indent.o
+prog.orig
 toledo3
+toledo3.orig
 toledo3-sbar
 toledo3-txt
-toledo3.orig
-prog.orig
diff --git a/2011/akari/.gitignore b/2011/akari/.gitignore
index ba6d77d80..02baf6e31 100644
--- a/2011/akari/.gitignore
+++ b/2011/akari/.gitignore
@@ -1,3 +1,5 @@
+#
+# sort with: sort -d -u
 akari
 akari2 
 akari2.c
@@ -5,10 +7,14 @@ akari3
 akari3.c
 akari4
 akari4.c
-even_output.ppm
-odd_output.ppm
 akari.orig
-prog.orig
-rot13.c
+*.dSYM
+even_output.ppm
 expanded_and_rot13_output.txt
 expanded_output.txt
+indent
+indent.c
+indent.o
+odd_output.ppm
+prog.orig
+rot13.c
diff --git a/2011/blakely/.gitignore b/2011/blakely/.gitignore
index 772efd750..d647f6c48 100644
--- a/2011/blakely/.gitignore
+++ b/2011/blakely/.gitignore
@@ -1,4 +1,10 @@
+#
+# sort with: sort -d -u
 blakely
-garden.txt
 blakely.orig
+*.dSYM
+garden.txt
+indent
+indent.c
+indent.o
 prog.orig
diff --git a/2011/borsanyi/.gitignore b/2011/borsanyi/.gitignore
index 5b920d202..5fbdff909 100644
--- a/2011/borsanyi/.gitignore
+++ b/2011/borsanyi/.gitignore
@@ -1,3 +1,9 @@
+#
+# sort with: sort -d -u
 borsanyi
 borsanyi.orig
+*.dSYM
+indent
+indent.c
+indent.o
 prog.orig
diff --git a/2011/dlowe/.gitignore b/2011/dlowe/.gitignore
index 82b96e689..16991bfbd 100644
--- a/2011/dlowe/.gitignore
+++ b/2011/dlowe/.gitignore
@@ -1,4 +1,10 @@
+#
+# sort with: sort -d -u
+*.dSYM
 dlowe
-trailed.net
 dlowe.orig
+indent
+indent.c
+indent.o
 prog.orig
+trailed.net
diff --git a/2011/eastman/.gitignore b/2011/eastman/.gitignore
index 60f59b925..fe836c86e 100644
--- a/2011/eastman/.gitignore
+++ b/2011/eastman/.gitignore
@@ -1,3 +1,9 @@
+#
+# sort with: sort -d -u
+*.dSYM
 eastman
 eastman.orig
+indent
+indent.c
+indent.o
 prog.orig
diff --git a/2011/fredriksson/.gitignore b/2011/fredriksson/.gitignore
index 123e7f821..541280740 100644
--- a/2011/fredriksson/.gitignore
+++ b/2011/fredriksson/.gitignore
@@ -1,5 +1,11 @@
-fredriksson
+#
+# sort with: sort -d -u
 ag
 ag.c
+*.dSYM
+fredriksson
 fredriksson.orig
+indent
+indent.c
+indent.o
 prog.orig
diff --git a/2011/goren/.gitignore b/2011/goren/.gitignore
index 9574cd78a..b61c54fea 100644
--- a/2011/goren/.gitignore
+++ b/2011/goren/.gitignore
@@ -1,3 +1,9 @@
+#
+# sort with: sort -d -u
+*.dSYM
 goren
 goren.orig
+indent
+indent.c
+indent.o
 prog.orig
diff --git a/2011/hamaji/.gitignore b/2011/hamaji/.gitignore
index 48efa30e4..5ea0a345d 100644
--- a/2011/hamaji/.gitignore
+++ b/2011/hamaji/.gitignore
@@ -1,5 +1,11 @@
-hamaji
-hamaji.orig
-prog.orig
+#
+# sort with: sort -d -u
+*.dSYM
 dragon
 dragon2
+hamaji
+hamaji.orig
+indent
+indent.c
+indent.o
+prog.orig
diff --git a/2011/hou/.gitignore b/2011/hou/.gitignore
index 1d2c0f26b..6dd824149 100644
--- a/2011/hou/.gitignore
+++ b/2011/hou/.gitignore
@@ -1,3 +1,9 @@
+#
+# sort with: sort -d -u
+*.dSYM
 hou
 hou.orig
+indent
+indent.c
+indent.o
 prog.orig
diff --git a/2011/konno/.gitignore b/2011/konno/.gitignore
index a0e566dd0..509233b59 100644
--- a/2011/konno/.gitignore
+++ b/2011/konno/.gitignore
@@ -1,3 +1,9 @@
+#
+# sort with: sort -d -u
+*.dSYM
+indent
+indent.c
+indent.o
 konno
 konno.orig
 prog.orig
diff --git a/2011/richards/.gitignore b/2011/richards/.gitignore
index c13e760fd..210d805de 100644
--- a/2011/richards/.gitignore
+++ b/2011/richards/.gitignore
@@ -1,3 +1,9 @@
+#
+# sort with: sort -d -u
+*.dSYM
+indent
+indent.c
+indent.o
+prog.orig
 richards
 richards.orig
-prog.orig
diff --git a/2011/toledo/.gitignore b/2011/toledo/.gitignore
index e1f79fa3a..6aad0486d 100644
--- a/2011/toledo/.gitignore
+++ b/2011/toledo/.gitignore
@@ -1,5 +1,11 @@
+#
+# sort with: sort -d -u
+*.dSYM
+indent
+indent.c
+indent.o
+prog.orig
 toledo
 toledo.alt
 toledo.alt2
 toledo.orig
-prog.orig
diff --git a/2011/vik/.gitignore b/2011/vik/.gitignore
index b00f85d15..8af17a3e7 100644
--- a/2011/vik/.gitignore
+++ b/2011/vik/.gitignore
@@ -1,5 +1,11 @@
-vik
+#
+# sort with: sort -d -u
 audio_file.raw
+*.dSYM
+indent
+indent.c
+indent.o
+prog.orig
+vik
 vik.alt
 vik.orig
-prog.orig
diff --git a/2011/zucker/.gitignore b/2011/zucker/.gitignore
index c528fa7a1..1f6205a6e 100644
--- a/2011/zucker/.gitignore
+++ b/2011/zucker/.gitignore
@@ -1,9 +1,15 @@
-image.ppm
-image.png
+#
+# sort with: sort -d -u
+*.dSYM
 hello.ppm
 image2.ppm
-ioccc2011.ppm
+image.png
+image.ppm
+indent
+indent.c
+indent.o
 ioccc2011.png
+ioccc2011.ppm
+prog.orig
 zucker
 zucker.orig
-prog.orig
diff --git a/2012/blakely/.gitignore b/2012/blakely/.gitignore
index b3ac8b413..94feba676 100644
--- a/2012/blakely/.gitignore
+++ b/2012/blakely/.gitignore
@@ -1,10 +1,16 @@
+#
+# sort with: sort -d -u
 blakely
-output.gif
-paraboloid.gif
+blakely.orig
+*.dSYM
 empty.gif
 flat.gif
+indent
+indent.c
+indent.o
+output.gif
+paraboloid.gif
 pic.gif
+prog.orig
 ripple.gif
 saddle.gif
-blakely.orig
-prog.orig
diff --git a/2012/deckmyn/.gitignore b/2012/deckmyn/.gitignore
index 7398d355b..2ea892cd5 100644
--- a/2012/deckmyn/.gitignore
+++ b/2012/deckmyn/.gitignore
@@ -1,11 +1,15 @@
+#
+# sort with: sort -d -u
 beethoven.pbm
 blank.pbm
+*.dSYM
 deckmyn
+deckmyn.orig
 example_greensleeves
 greensleeves.pbm
-sheetmusic.pbm
-sheetmusic.pbm
-sheetmusic.pbm
+indent
+indent.c
+indent.o
 output.pbm
-deckmyn.orig
 prog.orig
+sheetmusic.pbm
diff --git a/2012/dlowe/.gitignore b/2012/dlowe/.gitignore
index 54b04a50b..915bce873 100644
--- a/2012/dlowe/.gitignore
+++ b/2012/dlowe/.gitignore
@@ -1,3 +1,9 @@
+#
+# sort with: sort -d -u
+*.dSYM
 dlowe
 dlowe.orig
+indent
+indent.c
+indent.o
 prog.orig
diff --git a/2012/endoh1/.gitignore b/2012/endoh1/.gitignore
index 2ab43d1b1..11c2f090c 100644
--- a/2012/endoh1/.gitignore
+++ b/2012/endoh1/.gitignore
@@ -1,9 +1,15 @@
+#
+# sort with: sort -d -u
+configuration.txt
+*.dSYM
 endoh1
 endoh1.alt
 endoh1.alt2
 endoh1_color
-endoh1_color.alt2
 endoh1_color.alt
-configuration.txt
+endoh1_color.alt2
 endoh1.orig
+indent
+indent.c
+indent.o
 prog.orig
diff --git a/2012/endoh2/.gitignore b/2012/endoh2/.gitignore
index 6d4ca8a82..43bd00750 100644
--- a/2012/endoh2/.gitignore
+++ b/2012/endoh2/.gitignore
@@ -1,43 +1,49 @@
+#
+# sort with: sort -d -u
 271
-271.c
 2718
-2718.c
 27182
-27182.c
 271828
-271828.c
 2718281
-2718281.c
 27182818
-27182818.c
 271828182
-271828182.c
 2718281828
-2718281828.c
 27182818284
 27182818284.c
+2718281828.c
+271828182.c
+27182818.c
+2718281.c
+271828.c
+27182.c
+2718.c
+271.c
 314
-314.c
 3141
-3141.c
 31415
-31415.c
 314159
-314159.c
 3141592
-3141592.c
 31415926
-31415926.c
 314159265
-314159265.c
 3141592653
-3141592653.c
 31415926535
 31415926535.c
+3141592653.c
+314159265.c
+31415926.c
+3141592.c
+314159.c
+31415.c
+3141.c
+314.c
+*.dSYM
 e
 e.c
 endoh2
+endoh2.orig
+indent
+indent.c
+indent.o
 pi
 pi.c
-endoh2.orig
 prog.orig
diff --git a/2012/grothe/.gitignore b/2012/grothe/.gitignore
index 66c9ff95b..c615752d4 100644
--- a/2012/grothe/.gitignore
+++ b/2012/grothe/.gitignore
@@ -1,5 +1,11 @@
+#
+# sort with: sort -d -u
+*.dSYM
 grothe
 grothe.c.1
 grothe.c.2
 grothe.orig
+indent
+indent.c
+indent.o
 prog.orig
diff --git a/2012/hamano/.gitignore b/2012/hamano/.gitignore
index 0b1b01e77..260210b83 100644
--- a/2012/hamano/.gitignore
+++ b/2012/hamano/.gitignore
@@ -1,9 +1,15 @@
+#
+# sort with: sort -d -u
+*.dSYM
 hamano
-hint
-hint.pdf
-hello.pdf
+hamano.orig
 hello2
 hello3
+hello.pdf
+hint
+hint.pdf
+indent
+indent.c
+indent.o
 output.pdf
-hamano.orig
 prog.orig
diff --git a/2012/hou/.gitignore b/2012/hou/.gitignore
index bb3ff807f..6df56bff2 100644
--- a/2012/hou/.gitignore
+++ b/2012/hou/.gitignore
@@ -1,6 +1,11 @@
+#
+# sort with: sort -d -u
+*.dSYM
 hou
 hou.html
-remarks.htm
-remarks.htm
 hou.orig
+indent
+indent.c
+indent.o
 prog.orig
+remarks.htm
diff --git a/2012/kang/.gitignore b/2012/kang/.gitignore
index 9b4ee4301..41f10dbad 100644
--- a/2012/kang/.gitignore
+++ b/2012/kang/.gitignore
@@ -1,3 +1,9 @@
+#
+# sort with: sort -d -u
+*.dSYM
+indent
+indent.c
+indent.o
 kang
 kang.alt
 kang.orig
diff --git a/2012/konno/.gitignore b/2012/konno/.gitignore
index 4a1ad3a85..0a8895fa2 100644
--- a/2012/konno/.gitignore
+++ b/2012/konno/.gitignore
@@ -1,3 +1,9 @@
+#
+# sort with: sort -d -u
+*.dSYM
+indent
+indent.c
+indent.o
 konno
 konno.alt
 konno.orig
diff --git a/2012/omoikane/.gitignore b/2012/omoikane/.gitignore
index 6e0bd6a64..0f7085ddd 100644
--- a/2012/omoikane/.gitignore
+++ b/2012/omoikane/.gitignore
@@ -1,13 +1,19 @@
+#
+# sort with: sort -d -u
+*.dSYM
 data
 data.c
+indent
+indent.c
+indent.o
 key
 key.c
 nyaruko
 nyaruko.alt
 nyaruko.alt2
+omoikane.orig
 output
 output.2
 output.c
-regenerated.bin
-omoikane.orig
 prog.orig
+regenerated.bin
diff --git a/2012/tromp/.gitignore b/2012/tromp/.gitignore
index 0011eedb1..f8581d593 100644
--- a/2012/tromp/.gitignore
+++ b/2012/tromp/.gitignore
@@ -1,5 +1,11 @@
+#
+# sort with: sort -d -u
+*.dSYM
+indent
+indent.c
+indent.o
+prog.orig
 tromp
 tromp32
 tromp64
 tromp.orig
-prog.orig
diff --git a/2012/vik/.gitignore b/2012/vik/.gitignore
index 94929532f..8179c315a 100644
--- a/2012/vik/.gitignore
+++ b/2012/vik/.gitignore
@@ -1,11 +1,17 @@
-mmm-chocolate.png
+#
+# sort with: sort -d -u
 chocolate-in-ioccc.png
+*.dSYM
 encodedimg.png
+indent
+indent.c
+indent.o
 ioccc-in-chocolate.png
+mmm-chocolate.png
+prog.orig
 restored-chocolate.png
 restored-ioccc.png
 restored.png
 vik
 vik.alt
 vik.orig
-prog.orig
diff --git a/2012/zeitak/.gitignore b/2012/zeitak/.gitignore
index a491adef1..2c2f71ddd 100644
--- a/2012/zeitak/.gitignore
+++ b/2012/zeitak/.gitignore
@@ -1,4 +1,10 @@
+#
+# sort with: sort -d -u
+*.dSYM
+indent
+indent.c
+indent.o
+prog.orig
 zeitak
 zeitak.alt
 zeitak.orig
-prog.orig
diff --git a/2013/.gitignore b/2013/.gitignore
new file mode 100644
index 000000000..ee6ed16ce
--- /dev/null
+++ b/2013/.gitignore
@@ -0,0 +1,4 @@
+#
+# sort with: sort -d -u
+iocccsize
+iocccsize.o
diff --git a/2013/birken/.gitignore b/2013/birken/.gitignore
index 68a90f3c4..05a3700c8 100644
--- a/2013/birken/.gitignore
+++ b/2013/birken/.gitignore
@@ -1,4 +1,10 @@
+#
+# sort with: sort -d -u
 birken
 birken.alt
 birken.orig
+*.dSYM
+indent
+indent.c
+indent.o
 prog.orig
diff --git a/2013/cable1/.gitignore b/2013/cable1/.gitignore
index 26d8499e2..cb8a1f04c 100644
--- a/2013/cable1/.gitignore
+++ b/2013/cable1/.gitignore
@@ -1,3 +1,9 @@
+#
+# sort with: sort -d -u
 cable1
 cable1.orig
+*.dSYM
+indent
+indent.c
+indent.o
 prog.orig
diff --git a/2013/cable2/.gitignore b/2013/cable2/.gitignore
index 974e82d8d..60161c029 100644
--- a/2013/cable2/.gitignore
+++ b/2013/cable2/.gitignore
@@ -1,4 +1,10 @@
+#
+# sort with: sort -d -u
 cable2
 cable2.orig
-prog.orig
+*.dSYM
 hello
+indent
+indent.c
+indent.o
+prog.orig
diff --git a/2013/cable3/.gitignore b/2013/cable3/.gitignore
index 8ee26aab3..0ccc9bd4d 100644
--- a/2013/cable3/.gitignore
+++ b/2013/cable3/.gitignore
@@ -1,4 +1,10 @@
+#
+# sort with: sort -d -u
 cable3
-cable.alt
 cable3.orig
+cable.alt
+*.dSYM
+indent
+indent.c
+indent.o
 prog.orig
diff --git a/2013/dlowe/.gitignore b/2013/dlowe/.gitignore
index ed369cb9f..a5e2a4ab7 100644
--- a/2013/dlowe/.gitignore
+++ b/2013/dlowe/.gitignore
@@ -1,8 +1,14 @@
+#
+# sort with: sort -d -u
 1.txt
 2.txt
+*.dSYM
 dlowe
 dlowe.orig
 fun
+indent
+indent.c
+indent.o
 ioccc.txt
 prog.orig
 sparkl
diff --git a/2013/endoh1/.gitignore b/2013/endoh1/.gitignore
index 0f7fc3d2a..b76a8a2de 100644
--- a/2013/endoh1/.gitignore
+++ b/2013/endoh1/.gitignore
@@ -1,6 +1,12 @@
+#
+# sort with: sort -d -u
+*.dSYM
 echo
 endoh1
-hello
-tac
 endoh1.orig
+hello
+indent
+indent.c
+indent.o
 prog.orig
+tac
diff --git a/2013/endoh2/.gitignore b/2013/endoh2/.gitignore
index 6f9f7823d..3d3fd040d 100644
--- a/2013/endoh2/.gitignore
+++ b/2013/endoh2/.gitignore
@@ -1,6 +1,12 @@
+#
+# sort with: sort -d -u
+*.dSYM
 endoh2
+endoh2.orig
+indent
+indent.c
+indent.o
 jpeg
 jpeg.c
 jpeg.jpg
-endoh2.orig
 prog.orig
diff --git a/2013/endoh3/.gitignore b/2013/endoh3/.gitignore
index 39171d777..fbe1fd107 100644
--- a/2013/endoh3/.gitignore
+++ b/2013/endoh3/.gitignore
@@ -1,3 +1,9 @@
+#
+# sort with: sort -d -u
+*.dSYM
 endoh3
 endoh3.orig
+indent
+indent.c
+indent.o
 prog.orig
diff --git a/2013/endoh4/.gitignore b/2013/endoh4/.gitignore
index 4bbf9d2ec..671f9514d 100644
--- a/2013/endoh4/.gitignore
+++ b/2013/endoh4/.gitignore
@@ -1,3 +1,9 @@
+#
+# sort with: sort -d -u
+*.dSYM
 endoh4
 endoh4.orig
+indent
+indent.c
+indent.o
 prog.orig
diff --git a/2013/hou/.gitignore b/2013/hou/.gitignore
index abea76200..4250098f6 100644
--- a/2013/hou/.gitignore
+++ b/2013/hou/.gitignore
@@ -1,11 +1,17 @@
+#
+# sort with: sort -d -u
+4old_default.ppm
 a
 a.c
+*.dSYM
 hou
 hou.orig
 hou.tmp
 hou.tmp.c
-prog.orig
+indent
+indent.c
+indent.o
 luna.ppm
 old_default.ppm
-4old_default.ppm
 otherroom.ppm
+prog.orig
diff --git a/2013/mills/.gitignore b/2013/mills/.gitignore
index 4108396dd..3e95bc2de 100644
--- a/2013/mills/.gitignore
+++ b/2013/mills/.gitignore
@@ -1,3 +1,9 @@
+#
+# sort with: sort -d -u
+*.dSYM
+indent
+indent.c
+indent.o
 mills
 mills.orig
 prog.orig
diff --git a/2013/misaka/.gitignore b/2013/misaka/.gitignore
index 63951fba3..569dacc2b 100644
--- a/2013/misaka/.gitignore
+++ b/2013/misaka/.gitignore
@@ -1,4 +1,10 @@
+#
+# sort with: sort -d -u
+*.dSYM
 horizontal_cat
+indent
+indent.c
+indent.o
 long_cat
 long_cat.txt
 long_faat_cat
@@ -15,8 +21,8 @@ misaka6.c
 misaka7.c
 misaka8.c
 misaka9.c
+misaka.orig
+prog.orig
 same_as_long_cat
 same_as_long_cat.txt
 vertical_cat
-misaka.orig
-prog.orig
diff --git a/2013/morgan1/.gitignore b/2013/morgan1/.gitignore
index 4577b8582..9647e213c 100644
--- a/2013/morgan1/.gitignore
+++ b/2013/morgan1/.gitignore
@@ -1,3 +1,9 @@
+#
+# sort with: sort -d -u
+*.dSYM
+indent
+indent.c
+indent.o
 morgan1
 morgan1.orig
 prog.orig
diff --git a/2013/morgan2/.gitignore b/2013/morgan2/.gitignore
index 9b27a6331..b4b96eeb6 100644
--- a/2013/morgan2/.gitignore
+++ b/2013/morgan2/.gitignore
@@ -1,3 +1,9 @@
+#
+# sort with: sort -d -u
+*.dSYM
+indent
+indent.c
+indent.o
 morgan2
 morgan2.orig
 prog.orig
diff --git a/2013/robison/.gitignore b/2013/robison/.gitignore
index 672ba4f0c..4fdea5695 100644
--- a/2013/robison/.gitignore
+++ b/2013/robison/.gitignore
@@ -1,3 +1,9 @@
+#
+# sort with: sort -d -u
+*.dSYM
+indent
+indent.c
+indent.o
+prog.orig
 robison
 robison.orig
-prog.orig
diff --git a/2014/.gitignore b/2014/.gitignore
new file mode 100644
index 000000000..ee6ed16ce
--- /dev/null
+++ b/2014/.gitignore
@@ -0,0 +1,4 @@
+#
+# sort with: sort -d -u
+iocccsize
+iocccsize.o
diff --git a/2014/birken/.gitignore b/2014/birken/.gitignore
index 160504d00..f830336a5 100644
--- a/2014/birken/.gitignore
+++ b/2014/birken/.gitignore
@@ -1,3 +1,9 @@
+#
+# sort with: sort -d -u
+*.dSYM
+indent
+indent.c
+indent.o
 prog
 prog.alt
 prog.orig
diff --git a/2014/deak/.gitignore b/2014/deak/.gitignore
index 160504d00..f830336a5 100644
--- a/2014/deak/.gitignore
+++ b/2014/deak/.gitignore
@@ -1,3 +1,9 @@
+#
+# sort with: sort -d -u
+*.dSYM
+indent
+indent.c
+indent.o
 prog
 prog.alt
 prog.orig
diff --git a/2014/endoh1/.gitignore b/2014/endoh1/.gitignore
index fe71f8ded..e6e77b8dd 100644
--- a/2014/endoh1/.gitignore
+++ b/2014/endoh1/.gitignore
@@ -1,14 +1,20 @@
-main
-main.c
-prog
-treacle
-treacle.c
-prog.orig
-m.c
-src/
-src.zip
-seq.txt
+#
+# sort with: sort -d -u
 alpha.txt
 ast.txt
-reg.txt
+*.dSYM
+indent
+indent.c
+indent.o
+main
+main.c
+m.c
+prog
+prog.orig
 raw.txt
+reg.txt
+seq.txt
+src/
+src.zip
+treacle
+treacle.c
diff --git a/2014/endoh2/.gitignore b/2014/endoh2/.gitignore
index 6846e3735..3f5765c24 100644
--- a/2014/endoh2/.gitignore
+++ b/2014/endoh2/.gitignore
@@ -1,6 +1,12 @@
+#
+# sort with: sort -d -u
+*.dSYM
+hello
+hello.c
+indent
+indent.c
+indent.o
+ioccc
+ioccc.c
 prog
 prog.orig
-hello.c
-hello
-ioccc.c
-ioccc
diff --git a/2014/maffiodo1/.gitignore b/2014/maffiodo1/.gitignore
index a1e7bc695..eb19e2f8d 100644
--- a/2014/maffiodo1/.gitignore
+++ b/2014/maffiodo1/.gitignore
@@ -1,2 +1,8 @@
+#
+# sort with: sort -d -u
+*.dSYM
+indent
+indent.c
+indent.o
 prog
 prog.orig
diff --git a/2014/maffiodo2/.gitignore b/2014/maffiodo2/.gitignore
index a1e7bc695..eb19e2f8d 100644
--- a/2014/maffiodo2/.gitignore
+++ b/2014/maffiodo2/.gitignore
@@ -1,2 +1,8 @@
+#
+# sort with: sort -d -u
+*.dSYM
+indent
+indent.c
+indent.o
 prog
 prog.orig
diff --git a/2014/morgan/.gitignore b/2014/morgan/.gitignore
index 69ff0c3c2..3aff160e9 100644
--- a/2014/morgan/.gitignore
+++ b/2014/morgan/.gitignore
@@ -1,3 +1,9 @@
-prog
+#
+# sort with: sort -d -u
+*.dSYM
+indent
+indent.c
+indent.o
 morgan
+prog
 prog.orig
diff --git a/2014/sinon/.gitignore b/2014/sinon/.gitignore
index 6e668d2f1..f2081dccf 100644
--- a/2014/sinon/.gitignore
+++ b/2014/sinon/.gitignore
@@ -1,5 +1,11 @@
+#
+# sort with: sort -d -u
+*.dSYM
+indent
+indent.c
+indent.o
 prog
-sinon.c
 prog.orig
 run
 run.c
+sinon.c
diff --git a/2014/skeggs/.gitignore b/2014/skeggs/.gitignore
index 435d3cd6e..14dc1a6e7 100644
--- a/2014/skeggs/.gitignore
+++ b/2014/skeggs/.gitignore
@@ -1,6 +1,12 @@
+#
+# sort with: sort -d -u
+*.dSYM
+err
+indent
+indent.c
+indent.o
 prog
 prog.orig
-err
 static_assert
 t.c
 thread_local
diff --git a/2014/vik/.gitignore b/2014/vik/.gitignore
index 02a114255..b05374ba7 100644
--- a/2014/vik/.gitignore
+++ b/2014/vik/.gitignore
@@ -1,5 +1,11 @@
+#
+# sort with: sort -d -u
 audio_file.raw
+*.dSYM
+indent
+indent.c
+indent.o
 prog
 prog.alt
-prog.raw
 prog.orig
+prog.raw
diff --git a/2014/wiedijk/.gitignore b/2014/wiedijk/.gitignore
index a1e7bc695..eb19e2f8d 100644
--- a/2014/wiedijk/.gitignore
+++ b/2014/wiedijk/.gitignore
@@ -1,2 +1,8 @@
+#
+# sort with: sort -d -u
+*.dSYM
+indent
+indent.c
+indent.o
 prog
 prog.orig
diff --git a/2015/.gitignore b/2015/.gitignore
new file mode 100644
index 000000000..ee6ed16ce
--- /dev/null
+++ b/2015/.gitignore
@@ -0,0 +1,4 @@
+#
+# sort with: sort -d -u
+iocccsize
+iocccsize.o
diff --git a/2015/burton/.gitignore b/2015/burton/.gitignore
index 160504d00..f830336a5 100644
--- a/2015/burton/.gitignore
+++ b/2015/burton/.gitignore
@@ -1,3 +1,9 @@
+#
+# sort with: sort -d -u
+*.dSYM
+indent
+indent.c
+indent.o
 prog
 prog.alt
 prog.orig
diff --git a/2015/dogon/.gitignore b/2015/dogon/.gitignore
index a1e7bc695..eb19e2f8d 100644
--- a/2015/dogon/.gitignore
+++ b/2015/dogon/.gitignore
@@ -1,2 +1,8 @@
+#
+# sort with: sort -d -u
+*.dSYM
+indent
+indent.c
+indent.o
 prog
 prog.orig
diff --git a/2015/duble/.gitignore b/2015/duble/.gitignore
index 160504d00..f830336a5 100644
--- a/2015/duble/.gitignore
+++ b/2015/duble/.gitignore
@@ -1,3 +1,9 @@
+#
+# sort with: sort -d -u
+*.dSYM
+indent
+indent.c
+indent.o
 prog
 prog.alt
 prog.orig
diff --git a/2015/endoh1/.gitignore b/2015/endoh1/.gitignore
index a792f966f..bc086e603 100644
--- a/2015/endoh1/.gitignore
+++ b/2015/endoh1/.gitignore
@@ -1,3 +1,6 @@
+#
+# sort with: sort -d -u
+*.dSYM
 fitzhugh-nagumo-1
 fitzhugh-nagumo-2
 ginzburg-landau
@@ -5,6 +8,9 @@ gray-scott-1
 gray-scott-2
 gray-scott-3
 gray-scott-4
+indent
+indent.c
+indent.o
 oregonator
 prog
 prog.orig
diff --git a/2015/endoh2/.gitignore b/2015/endoh2/.gitignore
index a1e7bc695..eb19e2f8d 100644
--- a/2015/endoh2/.gitignore
+++ b/2015/endoh2/.gitignore
@@ -1,2 +1,8 @@
+#
+# sort with: sort -d -u
+*.dSYM
+indent
+indent.c
+indent.o
 prog
 prog.orig
diff --git a/2015/endoh3/.gitignore b/2015/endoh3/.gitignore
index a30c9b113..a37730a7c 100644
--- a/2015/endoh3/.gitignore
+++ b/2015/endoh3/.gitignore
@@ -1,3 +1,9 @@
-prog
+#
+# sort with: sort -d -u
+*.dSYM
+indent
+indent.c
+indent.o
 ioccc
+prog
 prog.orig
diff --git a/2015/endoh4/.gitignore b/2015/endoh4/.gitignore
index 160504d00..f830336a5 100644
--- a/2015/endoh4/.gitignore
+++ b/2015/endoh4/.gitignore
@@ -1,3 +1,9 @@
+#
+# sort with: sort -d -u
+*.dSYM
+indent
+indent.c
+indent.o
 prog
 prog.alt
 prog.orig
diff --git a/2015/hou/.gitignore b/2015/hou/.gitignore
index 746b4ae4b..2f585c623 100644
--- a/2015/hou/.gitignore
+++ b/2015/hou/.gitignore
@@ -1,3 +1,9 @@
+#
+# sort with: sort -d -u
+*.dSYM
+indent
+indent.c
+indent.o
 prebuild
 prog
 prog.orig
diff --git a/2015/howe/.gitignore b/2015/howe/.gitignore
index b2f5a1598..c9fb162fb 100644
--- a/2015/howe/.gitignore
+++ b/2015/howe/.gitignore
@@ -1,25 +1,31 @@
-curds.tmp
-makeholes
-nuked.tmp
-prog
-prog.alt
-war-and-peace.txt
-whey.tmp
-1.tmp
+#
+# sort with: sort -d -u
 123.tmp
-A.tmp
+1.tmp
 ABCABBA.tmp
-ABCD.tmp
-ABCDE.tmp
-ABCDEF.tmp
 ABCDEFGHIJK.tmp
+ABCDEF.tmp
+ABCDE.tmp
+ABCD.tmp
 ABCEFGIJKDEFGHIJK.tmp
+ABD.tmp
 ABXYEFCD.tmp
 ACBDEACBED.tmp
 ACDBECFD.tmp
 ACEBDABBABED.tmp
+A.tmp
 CBABAC.tmp
 EMPTY.tmp
+curds.tmp
+*.dSYM
+indent
+indent.c
+indent.o
+makeholes
+nuked.tmp
 patch.tmp
-ABD.tmp
+prog
+prog.alt
 prog.orig
+war-and-peace.txt
+whey.tmp
diff --git a/2015/mills1/.gitignore b/2015/mills1/.gitignore
index a1e7bc695..eb19e2f8d 100644
--- a/2015/mills1/.gitignore
+++ b/2015/mills1/.gitignore
@@ -1,2 +1,8 @@
+#
+# sort with: sort -d -u
+*.dSYM
+indent
+indent.c
+indent.o
 prog
 prog.orig
diff --git a/2015/mills2/.gitignore b/2015/mills2/.gitignore
index a677a824d..4ca5115dc 100644
--- a/2015/mills2/.gitignore
+++ b/2015/mills2/.gitignore
@@ -1,7 +1,13 @@
+#
+# sort with: sort -d -u
+*.dSYM
+indent
+indent.c
+indent.o
 ioccc.Z 
 prog
+prog.orig
 test1 
 test1.Z 
 test2 
 test2.Z
-prog.orig
diff --git a/2015/muth/.gitignore b/2015/muth/.gitignore
index a1e7bc695..eb19e2f8d 100644
--- a/2015/muth/.gitignore
+++ b/2015/muth/.gitignore
@@ -1,2 +1,8 @@
+#
+# sort with: sort -d -u
+*.dSYM
+indent
+indent.c
+indent.o
 prog
 prog.orig
diff --git a/2015/schweikhardt/.gitignore b/2015/schweikhardt/.gitignore
index a1e7bc695..eb19e2f8d 100644
--- a/2015/schweikhardt/.gitignore
+++ b/2015/schweikhardt/.gitignore
@@ -1,2 +1,8 @@
+#
+# sort with: sort -d -u
+*.dSYM
+indent
+indent.c
+indent.o
 prog
 prog.orig
diff --git a/2015/yang/.gitignore b/2015/yang/.gitignore
index c5646b5f4..ebe9519d9 100644
--- a/2015/yang/.gitignore
+++ b/2015/yang/.gitignore
@@ -1,8 +1,14 @@
+#
+# sort with: sort -d -u
+*.dSYM
+indent
+indent.c
+indent.o
 prog
-prog.cc
 prog_c11
 prog_c90
 prog_c99
+prog.cc
 prog_cpp11
 prog_cpp98
 prog.orig
diff --git a/2018/.gitignore b/2018/.gitignore
new file mode 100644
index 000000000..ee6ed16ce
--- /dev/null
+++ b/2018/.gitignore
@@ -0,0 +1,4 @@
+#
+# sort with: sort -d -u
+iocccsize
+iocccsize.o
diff --git a/2018/algmyr/.gitignore b/2018/algmyr/.gitignore
index fffe7d584..818b89eca 100644
--- a/2018/algmyr/.gitignore
+++ b/2018/algmyr/.gitignore
@@ -1,5 +1,11 @@
+#
+# sort with: sort -d -u
+*.dSYM
+indent
+indent.c
+indent.o
 out.raw
 prog
 prog.alt
-spectrogram.png
 prog.orig
+spectrogram.png
diff --git a/2018/anderson/.gitignore b/2018/anderson/.gitignore
index 160504d00..f830336a5 100644
--- a/2018/anderson/.gitignore
+++ b/2018/anderson/.gitignore
@@ -1,3 +1,9 @@
+#
+# sort with: sort -d -u
+*.dSYM
+indent
+indent.c
+indent.o
 prog
 prog.alt
 prog.orig
diff --git a/2018/bellard/.gitignore b/2018/bellard/.gitignore
index 59634cd91..aee2c9361 100644
--- a/2018/bellard/.gitignore
+++ b/2018/bellard/.gitignore
@@ -1,7 +1,13 @@
+#
+# sort with: sort -d -u
+*.dSYM
+fruits.ppm
+indent
+indent.c
+indent.o
+lena512.ppm
 lena.ppm
 prog
-small.jpg
-fruits.ppm
-lena512.ppm
-vintage_cars.ppm
 prog.orig
+small.jpg
+vintage_cars.ppm
diff --git a/2018/burton1/.gitignore b/2018/burton1/.gitignore
index 160504d00..f830336a5 100644
--- a/2018/burton1/.gitignore
+++ b/2018/burton1/.gitignore
@@ -1,3 +1,9 @@
+#
+# sort with: sort -d -u
+*.dSYM
+indent
+indent.c
+indent.o
 prog
 prog.alt
 prog.orig
diff --git a/2018/burton2/.gitignore b/2018/burton2/.gitignore
index 005f1b557..e2df8645d 100644
--- a/2018/burton2/.gitignore
+++ b/2018/burton2/.gitignore
@@ -1,3 +1,9 @@
+#
+# sort with: sort -d -u
+*.dSYM
+indent
+indent.c
+indent.o
 keywords
 manpage
 prog
diff --git a/2018/ciura/.gitignore b/2018/ciura/.gitignore
index 160504d00..f830336a5 100644
--- a/2018/ciura/.gitignore
+++ b/2018/ciura/.gitignore
@@ -1,3 +1,9 @@
+#
+# sort with: sort -d -u
+*.dSYM
+indent
+indent.c
+indent.o
 prog
 prog.alt
 prog.orig
diff --git a/2018/endoh1/.gitignore b/2018/endoh1/.gitignore
index b657b9b90..c73638c67 100644
--- a/2018/endoh1/.gitignore
+++ b/2018/endoh1/.gitignore
@@ -1,7 +1,13 @@
+#
+# sort with: sort -d -u
+*.dSYM
 golem.gif
+indent
+indent.c
+indent.o
 invisible.gif
 output.gif
 prog
 prog.gif
-smily.gif
 prog.orig
+smily.gif
diff --git a/2018/endoh2/.gitignore b/2018/endoh2/.gitignore
index 9c278530b..11433068f 100644
--- a/2018/endoh2/.gitignore
+++ b/2018/endoh2/.gitignore
@@ -1,3 +1,9 @@
+#
+# sort with: sort -d -u
+*.dSYM
+indent
+indent.c
+indent.o
 prog
 prog_next
 prog_next.c
diff --git a/2018/ferguson/.gitignore b/2018/ferguson/.gitignore
index 8057d8cdb..5349f7c48 100644
--- a/2018/ferguson/.gitignore
+++ b/2018/ferguson/.gitignore
@@ -1,6 +1,11 @@
+#
+# sort with: sort -d -u
+*.dSYM
+indent
+indent.c
+indent.o
 prog
 prog.alt
 prog.orig
 weasel
 weasel.alt
-prog.orig
diff --git a/2018/giles/.gitignore b/2018/giles/.gitignore
index a1e7bc695..eb19e2f8d 100644
--- a/2018/giles/.gitignore
+++ b/2018/giles/.gitignore
@@ -1,2 +1,8 @@
+#
+# sort with: sort -d -u
+*.dSYM
+indent
+indent.c
+indent.o
 prog
 prog.orig
diff --git a/2018/hou/.gitignore b/2018/hou/.gitignore
index a94800d30..52608ab91 100644
--- a/2018/hou/.gitignore
+++ b/2018/hou/.gitignore
@@ -1,3 +1,9 @@
+#
+# sort with: sort -d -u
+*.dSYM
+indent
+indent.c
+indent.o
 ioccc.html
 ioccc.json
 output.html
diff --git a/2018/mills/.gitignore b/2018/mills/.gitignore
index e9eb0cb87..bb3db6f53 100644
--- a/2018/mills/.gitignore
+++ b/2018/mills/.gitignore
@@ -1,10 +1,16 @@
+#
+# sort with: sort -d -u
 builddisk.bsd
 builddisk.v6
+*.dSYM
 empty.fs.bz2
+indent
+indent.c
+indent.o
 prog
+prog.orig
 rk05.bsd.fs
 rk05.v6.fs
 v0
 v6
 v6.img.bz2
-prog.orig
diff --git a/2018/poikola/.gitignore b/2018/poikola/.gitignore
index 168c706ad..47fe1a305 100644
--- a/2018/poikola/.gitignore
+++ b/2018/poikola/.gitignore
@@ -1,3 +1,9 @@
+#
+# sort with: sort -d -u
+*.dSYM
+indent
+indent.c
+indent.o
 poikola.aux
 poikola.log
 poikola.pdf
diff --git a/2018/vokes/.gitignore b/2018/vokes/.gitignore
index a1e7bc695..eb19e2f8d 100644
--- a/2018/vokes/.gitignore
+++ b/2018/vokes/.gitignore
@@ -1,2 +1,8 @@
+#
+# sort with: sort -d -u
+*.dSYM
+indent
+indent.c
+indent.o
 prog
 prog.orig
diff --git a/2018/yang/.gitignore b/2018/yang/.gitignore
index 7a1cb2b9c..c6778fac1 100644
--- a/2018/yang/.gitignore
+++ b/2018/yang/.gitignore
@@ -1,14 +1,20 @@
+#
+# sort with: sort -d -u
+*.dSYM
 generated1.c
 generated2.c
 generated3.c
 generated4.c
 generated5.c
+indent
+indent.c
+indent.o
 left
 msg[0-9]
-prog
-right
-shift
-rotated_counterclockwise.txt
-rotated_clockwise.txt
 no_leading_space.txt
+prog
 prog.orig
+right
+rotated_clockwise.txt
+rotated_counterclockwise.txt
+shift
diff --git a/2019/.gitignore b/2019/.gitignore
new file mode 100644
index 000000000..ee6ed16ce
--- /dev/null
+++ b/2019/.gitignore
@@ -0,0 +1,4 @@
+#
+# sort with: sort -d -u
+iocccsize
+iocccsize.o
diff --git a/2019/adamovsky/.gitignore b/2019/adamovsky/.gitignore
index ea11b0520..b2b2f72d2 100644
--- a/2019/adamovsky/.gitignore
+++ b/2019/adamovsky/.gitignore
@@ -1,4 +1,10 @@
+#
+# sort with: sort -d -u
+*.dSYM
 identify.unl
+indent
+indent.c
+indent.o
 iocccsize_2018
 prog
 prog2
diff --git a/2019/burton/.gitignore b/2019/burton/.gitignore
index 7615e3f6f..70340f3d8 100644
--- a/2019/burton/.gitignore
+++ b/2019/burton/.gitignore
@@ -1,5 +1,11 @@
+#
+# sort with: sort -d -u
+correct
+*.dSYM
+indent
+indent.c
+indent.o
 prog
 prog.clean
-correct
-remarks
 prog.orig
+remarks
diff --git a/2019/ciura/.gitignore b/2019/ciura/.gitignore
index 160504d00..f830336a5 100644
--- a/2019/ciura/.gitignore
+++ b/2019/ciura/.gitignore
@@ -1,3 +1,9 @@
+#
+# sort with: sort -d -u
+*.dSYM
+indent
+indent.c
+indent.o
 prog
 prog.alt
 prog.orig
diff --git a/2019/diels-grabsch1/.gitignore b/2019/diels-grabsch1/.gitignore
index 99c47509b..93eeb058c 100644
--- a/2019/diels-grabsch1/.gitignore
+++ b/2019/diels-grabsch1/.gitignore
@@ -1,6 +1,12 @@
-prog
+#
+# sort with: sort -d -u
+*.dSYM
 dg1.Z
-ref.Z
-guidelines.txt.Z
 guidelines2.txt
+guidelines.txt.Z
+indent
+indent.c
+indent.o
+prog
 prog.orig
+ref.Z
diff --git a/2019/diels-grabsch2/.gitignore b/2019/diels-grabsch2/.gitignore
index a1e7bc695..eb19e2f8d 100644
--- a/2019/diels-grabsch2/.gitignore
+++ b/2019/diels-grabsch2/.gitignore
@@ -1,2 +1,8 @@
+#
+# sort with: sort -d -u
+*.dSYM
+indent
+indent.c
+indent.o
 prog
 prog.orig
diff --git a/2019/dogon/.gitignore b/2019/dogon/.gitignore
index f3c420315..5f7300ec8 100644
--- a/2019/dogon/.gitignore
+++ b/2019/dogon/.gitignore
@@ -1,3 +1,9 @@
+#
+# sort with: sort -d -u
 apholife
+*.dSYM
+indent
+indent.c
+indent.o
 prog
 prog.orig
diff --git a/2019/duble/.gitignore b/2019/duble/.gitignore
index 08d30b08f..1f626df33 100644
--- a/2019/duble/.gitignore
+++ b/2019/duble/.gitignore
@@ -1,9 +1,15 @@
+#
+# sort with: sort -d -u
 Darwin
 Darwin.alt
 FreeBSD
 FreeBSD.alt
 Linux
 Linux.alt
+*.dSYM
+indent
+indent.c
+indent.o
 prog
 prog.alt
 prog.orig
diff --git a/2019/endoh/.gitignore b/2019/endoh/.gitignore
index 3bdaa29e9..f63f9f19d 100644
--- a/2019/endoh/.gitignore
+++ b/2019/endoh/.gitignore
@@ -1,3 +1,9 @@
+#
+# sort with: sort -d -u
+*.dSYM
+indent
+indent.c
+indent.o
 prog
 prog2.c
 prog.orig
diff --git a/2019/giles/.gitignore b/2019/giles/.gitignore
index 0f4a71bf9..4888ccd80 100644
--- a/2019/giles/.gitignore
+++ b/2019/giles/.gitignore
@@ -1,3 +1,9 @@
-prog
+#
+# sort with: sort -d -u
+*.dSYM
+indent
+indent.c
+indent.o
 out.wav
+prog
 prog.orig
diff --git a/2019/karns/.gitignore b/2019/karns/.gitignore
index 2c4ecd675..c96003bbd 100644
--- a/2019/karns/.gitignore
+++ b/2019/karns/.gitignore
@@ -1,3 +1,9 @@
+#
+# sort with: sort -d -u
+*.dSYM
+indent
+indent.c
+indent.o
 prog
-tbfs
 prog.orig
+tbfs
diff --git a/2019/lynn/.gitignore b/2019/lynn/.gitignore
index 4964e59a4..305346bc9 100644
--- a/2019/lynn/.gitignore
+++ b/2019/lynn/.gitignore
@@ -1,10 +1,16 @@
-prog
+#
+# sort with: sort -d -u
+*.dSYM
 fib
 fib.c
 hint
 hint.c
+indent
+indent.c
+indent.o
 lol
 lol.c
+prog
+prog.orig
 scc
 scc.c
-prog.orig
diff --git a/2019/mills/.gitignore b/2019/mills/.gitignore
index dd047d540..aaf68f12b 100644
--- a/2019/mills/.gitignore
+++ b/2019/mills/.gitignore
@@ -1,10 +1,17 @@
+#
+# sort with: sort -d -u
 Eugene_Onegin.txt
 IOCCC-Rules-Guidelines.txt
+IOCCC-hints.output.txt
 IOCCC-hints.txt
 Shakespeare.txt
+*.dSYM
 gru1
 gru2
 gru3
+indent
+indent.c
+indent.o
 lin1
 lstm1
 lstm2
@@ -14,11 +21,10 @@ lstmp2
 lstmp3
 per1
 prog
+prog.orig
 rlstm1
 rlstm2
 rlstm3
 rnn1
 rnn2
 rnn3
-IOCCC-hints.output.txt
-prog.orig
diff --git a/2019/poikola/.gitignore b/2019/poikola/.gitignore
index 168c706ad..47fe1a305 100644
--- a/2019/poikola/.gitignore
+++ b/2019/poikola/.gitignore
@@ -1,3 +1,9 @@
+#
+# sort with: sort -d -u
+*.dSYM
+indent
+indent.c
+indent.o
 poikola.aux
 poikola.log
 poikola.pdf
diff --git a/2019/yang/.gitignore b/2019/yang/.gitignore
index dca012991..946050e23 100644
--- a/2019/yang/.gitignore
+++ b/2019/yang/.gitignore
@@ -1,8 +1,14 @@
+#
+# sort with: sort -d -u
 a
 b
 c
 d
-prog
+*.dSYM
 e
+indent
+indent.c
+indent.o
 output.txt
+prog
 prog.orig
diff --git a/2020/.gitignore b/2020/.gitignore
index b52819133..ee6ed16ce 100644
--- a/2020/.gitignore
+++ b/2020/.gitignore
@@ -1,18 +1,4 @@
-burton/check
-burton/check_be
-burton/prog_be
-endoh2/spoiler/
-endoh3/clock
-endoh3/clock.c
-endoh3/run_clock
-ferguson2/recode
-kurdyukov2/out.gif
-kurdyukov2/out*.jpg
-kurdyukov2/output.ppm
-kurdyukov2/random.ppm
-kurdyukov2/prog_png
-kurdyukov2/prog_ppm
-kurdyukov3/prog.extra
-kurdyukov3/prog.orig
-yang/code.c
-yang/encoded.c
+#
+# sort with: sort -d -u
+iocccsize
+iocccsize.o
diff --git a/2020/burton/.gitignore b/2020/burton/.gitignore
index d0ea0f76c..3526e8a70 100644
--- a/2020/burton/.gitignore
+++ b/2020/burton/.gitignore
@@ -1,3 +1,9 @@
+#
+# sort with: sort -d -u
+*.dSYM
+indent
+indent.c
+indent.o
 prog
 prog_be
 prog_le
diff --git a/2020/carlini/.gitignore b/2020/carlini/.gitignore
index a1e7bc695..eb19e2f8d 100644
--- a/2020/carlini/.gitignore
+++ b/2020/carlini/.gitignore
@@ -1,2 +1,8 @@
+#
+# sort with: sort -d -u
+*.dSYM
+indent
+indent.c
+indent.o
 prog
 prog.orig
diff --git a/2020/endoh1/.gitignore b/2020/endoh1/.gitignore
index 160504d00..f830336a5 100644
--- a/2020/endoh1/.gitignore
+++ b/2020/endoh1/.gitignore
@@ -1,3 +1,9 @@
+#
+# sort with: sort -d -u
+*.dSYM
+indent
+indent.c
+indent.o
 prog
 prog.alt
 prog.orig
diff --git a/2020/endoh2/.gitignore b/2020/endoh2/.gitignore
index a1e7bc695..eb19e2f8d 100644
--- a/2020/endoh2/.gitignore
+++ b/2020/endoh2/.gitignore
@@ -1,2 +1,8 @@
+#
+# sort with: sort -d -u
+*.dSYM
+indent
+indent.c
+indent.o
 prog
 prog.orig
diff --git a/2020/endoh3/.gitignore b/2020/endoh3/.gitignore
index 152cc39a2..022c5af38 100644
--- a/2020/endoh3/.gitignore
+++ b/2020/endoh3/.gitignore
@@ -1,5 +1,11 @@
+#
+# sort with: sort -d -u
 clock
 clock.c
+*.dSYM
+indent
+indent.c
+indent.o
 prog
 prog.alt
 prog.orig
diff --git a/2020/ferguson1/.gitignore b/2020/ferguson1/.gitignore
index a076e585d..9a85678fc 100644
--- a/2020/ferguson1/.gitignore
+++ b/2020/ferguson1/.gitignore
@@ -1,8 +1,14 @@
+#
+# sort with: sort -d -u
+*.dSYM
+indent
+indent.c
+indent.o
 play
 prog
 prog.alt
-snake
-snake-colours
-snake.alt
-termcaps
 prog.orig
+snake
+snake.alt
+snake-colours
+termcaps
diff --git a/2020/ferguson2/.gitignore b/2020/ferguson2/.gitignore
index f505c425b..a9b3c30e8 100644
--- a/2020/ferguson2/.gitignore
+++ b/2020/ferguson2/.gitignore
@@ -1,6 +1,12 @@
-prog
-recode
+#
+# sort with: sort -d -u
+cake.sh
 chocolate-cake.dat
 chocolate-cake.key
-cake.sh
+*.dSYM
+indent
+indent.c
+indent.o
+prog
 prog.orig
+recode
diff --git a/2020/giles/.gitignore b/2020/giles/.gitignore
index a1e7bc695..eb19e2f8d 100644
--- a/2020/giles/.gitignore
+++ b/2020/giles/.gitignore
@@ -1,2 +1,8 @@
+#
+# sort with: sort -d -u
+*.dSYM
+indent
+indent.c
+indent.o
 prog
 prog.orig
diff --git a/2020/kurdyukov1/.gitignore b/2020/kurdyukov1/.gitignore
index 160504d00..f830336a5 100644
--- a/2020/kurdyukov1/.gitignore
+++ b/2020/kurdyukov1/.gitignore
@@ -1,3 +1,9 @@
+#
+# sort with: sort -d -u
+*.dSYM
+indent
+indent.c
+indent.o
 prog
 prog.alt
 prog.orig
diff --git a/2020/kurdyukov2/.gitignore b/2020/kurdyukov2/.gitignore
index ce9fefa7d..c0386c02b 100644
--- a/2020/kurdyukov2/.gitignore
+++ b/2020/kurdyukov2/.gitignore
@@ -1,4 +1,10 @@
+#
+# sort with: sort -d -u
+*.dSYM
+indent
+indent.c
+indent.o
 prog
+prog.orig
 prog_png
 prog_ppm
-prog.orig
diff --git a/2020/kurdyukov3/.gitignore b/2020/kurdyukov3/.gitignore
index d68544fe8..c2570721c 100644
--- a/2020/kurdyukov3/.gitignore
+++ b/2020/kurdyukov3/.gitignore
@@ -1,3 +1,9 @@
+#
+# sort with: sort -d -u
+*.dSYM
+indent
+indent.c
+indent.o
 prog
 prog.alt
 prog.extra
diff --git a/2020/kurdyukov4/.gitignore b/2020/kurdyukov4/.gitignore
index a61303c6e..a451e1264 100644
--- a/2020/kurdyukov4/.gitignore
+++ b/2020/kurdyukov4/.gitignore
@@ -1,4 +1,10 @@
+#
+# sort with: sort -d -u
+*.dSYM
+indent
+indent.c
+indent.o
 prog
+prog.orig
 rand
 test.txt
-prog.orig
diff --git a/2020/otterness/.gitignore b/2020/otterness/.gitignore
index a1e7bc695..eb19e2f8d 100644
--- a/2020/otterness/.gitignore
+++ b/2020/otterness/.gitignore
@@ -1,2 +1,8 @@
+#
+# sort with: sort -d -u
+*.dSYM
+indent
+indent.c
+indent.o
 prog
 prog.orig
diff --git a/2020/tsoj/.gitignore b/2020/tsoj/.gitignore
index 160504d00..f830336a5 100644
--- a/2020/tsoj/.gitignore
+++ b/2020/tsoj/.gitignore
@@ -1,3 +1,9 @@
+#
+# sort with: sort -d -u
+*.dSYM
+indent
+indent.c
+indent.o
 prog
 prog.alt
 prog.orig
diff --git a/2020/yang/.gitignore b/2020/yang/.gitignore
index a1e7bc695..eb19e2f8d 100644
--- a/2020/yang/.gitignore
+++ b/2020/yang/.gitignore
@@ -1,2 +1,8 @@
+#
+# sort with: sort -d -u
+*.dSYM
+indent
+indent.c
+indent.o
 prog
 prog.orig
diff --git a/CNAME b/CNAME
index 67cef5273..1315a721c 100644
--- a/CNAME
+++ b/CNAME
@@ -1 +1 @@
-ioccc.org
+www.ioccc.org
\ No newline at end of file
diff --git a/index.html b/index.html
index 2f1449a7f..782ad4100 100644
--- a/index.html
+++ b/index.html
@@ -23,16 +23,14 @@ Please visit
 <A HREF="https://www.ioccc.org/index.html">www.ioccc.org</A>
 for the official IOCCC web.
 <P>
-Please do <B>NOT</B> bookmark nor link to this
-<A HREF="https://ioccc-src.github.io/temp-test-ioccc/">experimental web site</A>:
+Please do <B>NOT</B> bookmark nor link to this <B>>experimental web site</B>:
 <BLOCKQUOTE>
 <A HREF="https://ioccc-src.github.io/temp-test-ioccc/">https://ioccc-src.github.io/temp-test-ioccc/</A>
 </BLOCKQUOTE>
 <P>
 When this experiment is finished, this site <B>will go away</B>!
 <P>
-This test web tree is part of the
-<A HREF="https://github.com/ioccc-src/temp-test-ioccc">temp-test-ioccc</A> GitHub repo:
+This test web tree is part of the <B>temp-test-ioccc GitHub repo</B>:
 <BLOCKQUOTE>
 <A HREF="https://github.com/ioccc-src/temp-test-ioccc">https://github.com/ioccc-src/temp-test-ioccc</A>
 </BLOCKQUOTE>
@@ -40,7 +38,7 @@ This test web tree is part of the
 This web site will be undergoing major changes, so expect many broken links, typos and other problems.
 If you wish to recommend changes (understanding that things may be rapidly changing out from under your copy),
 then consider making pull requests against the
-<A HREF="https://github.com/ioccc-src/temp-test-ioccc">temp-test-ioccc</A> GitHub repo.
+<A HREF="https://github.com/ioccc-src/temp-test-ioccc">temp-test-ioccc GitHub repo</A>.
 <HR>
 
 <P>