diff --git a/1987/wall/Makefile b/1987/wall/Makefile
index c41d661e6..3edd2f5eb 100644
--- a/1987/wall/Makefile
+++ b/1987/wall/Makefile
@@ -115,8 +115,8 @@ OBJ= ${PROG}.o
 DATA=
 TARGET= ${PROG}
 #
-ALT_OBJ= 
-ALT_TARGET= 
+ALT_OBJ=
+ALT_TARGET=
 
 
 #################
diff --git a/1992/adrian/Makefile b/1992/adrian/Makefile
index ce86316aa..9e2e27f42 100644
--- a/1992/adrian/Makefile
+++ b/1992/adrian/Makefile
@@ -118,8 +118,8 @@ OBJ= ${PROG}.o
 DATA=
 TARGET= ${PROG}
 #
-ALT_OBJ= 
-ALT_TARGET= 
+ALT_OBJ=
+ALT_TARGET=
 
 
 #################
diff --git a/1994/ldb/Makefile b/1994/ldb/Makefile
index 23f03d9c9..1b8d8425f 100644
--- a/1994/ldb/Makefile
+++ b/1994/ldb/Makefile
@@ -111,8 +111,8 @@ OBJ= ${PROG}.o
 DATA=
 TARGET= ${PROG}
 #
-ALT_OBJ= 
-ALT_TARGET= 
+ALT_OBJ=
+ALT_TARGET=
 
 # FORCE use of -trigraphs
 #
diff --git a/2000/anderson/Makefile b/2000/anderson/Makefile
index 7dfa31eda..c66e9d5a1 100644
--- a/2000/anderson/Makefile
+++ b/2000/anderson/Makefile
@@ -114,8 +114,8 @@ OBJ= ${PROG}.o
 DATA=
 TARGET= ${PROG}
 #
-ALT_OBJ= 
-ALT_TARGET= 
+ALT_OBJ=
+ALT_TARGET=
 
 
 #################
diff --git a/2001/anonymous/Makefile b/2001/anonymous/Makefile
index eb0530ae1..f870e5b07 100644
--- a/2001/anonymous/Makefile
+++ b/2001/anonymous/Makefile
@@ -116,7 +116,7 @@ ENTRY= anonymous
 PROG= ${ENTRY}
 #
 OBJ= ${PROG}.o
-DATA= 
+DATA=
 TARGET= ${PROG} ${PROG}.ten
 #
 ALT_OBJ=
diff --git a/2001/bellard/Makefile b/2001/bellard/Makefile
index c4634b8d4..533140bfb 100644
--- a/2001/bellard/Makefile
+++ b/2001/bellard/Makefile
@@ -55,7 +55,7 @@ CSTD= -std=gnu99
 # Some entries require 32-bitness: ARCH= -m32
 # Some entries require 64-bitness: ARCH= -m64
 #
-ARCH= 
+ARCH=
 
 # Defines that are needed to compile
 #
diff --git a/2004/kopczynski/Makefile b/2004/kopczynski/Makefile
index 4f3266e2f..d1166556f 100644
--- a/2004/kopczynski/Makefile
+++ b/2004/kopczynski/Makefile
@@ -66,7 +66,7 @@ CINCLUDE=
 
 # Optimization
 #
-OPT= 
+OPT=
 
 # Default flags for ANSI C compilation
 #
diff --git a/2015/howe/spoiler/Makefile b/2015/howe/spoiler/Makefile
index bc95387b4..4a875a465 100644
--- a/2015/howe/spoiler/Makefile
+++ b/2015/howe/spoiler/Makefile
@@ -1,69 +1,69 @@
-.POSIX :
-
-.SUFFIXES :
-A = .a
-O = .o
-.SUFFIXES : .c .h .i $O $A
-
-########################################################################
-### No further configuration beyond this point.
-########################################################################
-
-top_srcdir	:= ..
-CC		:= gcc
-CFLAGS		:= -g -O2 -std=c99 -Wall -pedantic -Wno-char-subscripts
-LDFLAGS		:=
-
-# Assume a POSIX compliant shell.
-#
-# On Linux
-#	/bin/sh = /bin/bash
-#
-# On NetBSD
-#	/bin/ksh
-#	/usr/pkg/bin/bash
-#
-# On OpenBSD
-#	/bin/ksh = /bin/pdksh
-#
-SHELL		:= /bin/ksh
-
-W64CC		:= i686-w64-mingw32-gcc
-W64CFLAGS	:= -I. -Os -s -std=c99 -Wno-char-subscripts
-
-ZIP	:= README.txt prog-w64.exe prog-test.sh avgtime.sh makeholes-w64.exe
-
-.c$O :
-	${CC} ${CFLAGS} -c $<
-
-.c$E :
-	$(CC) $(CFLAGS) $(LDFLAGS) -o$* $<
-
-$O :
-	$(LD) $(LDFLAGS) -o$* $*$O
-
-.c.i:
-	${CC} -E ${CFLAGS} $*.c >$*.i
-
-########################################################################
-
-all: build
-
-build: prog
-
-clean:
-	-rm prog *.exe *.i *$O *.tmp *.rej *.orig *.core *.out 2>/dev/null
-
-distclean: clean
-
-prog: prog.c
-	${CC} ${CFLAGS} ${LDFLAGS} -o$@ prog.c
-
-prog-w64: err.h prog.c
-	${W64CC} ${W64CFLAGS} ${LDFLAGS} -o$@ prog.c
-
-test:
-	${SHELL} ${top_srcdir}/prog-test.sh
-
-test-w64:
-	${SHELL} ${top_srcdir}/prog-test.sh -w
+.POSIX :
+
+.SUFFIXES :
+A = .a
+O = .o
+.SUFFIXES : .c .h .i $O $A
+
+########################################################################
+### No further configuration beyond this point.
+########################################################################
+
+top_srcdir	:= ..
+CC		:= gcc
+CFLAGS		:= -g -O2 -std=c99 -Wall -pedantic -Wno-char-subscripts
+LDFLAGS		:=
+
+# Assume a POSIX compliant shell.
+#
+# On Linux
+#	/bin/sh = /bin/bash
+#
+# On NetBSD
+#	/bin/ksh
+#	/usr/pkg/bin/bash
+#
+# On OpenBSD
+#	/bin/ksh = /bin/pdksh
+#
+SHELL		:= /bin/ksh
+
+W64CC		:= i686-w64-mingw32-gcc
+W64CFLAGS	:= -I. -Os -s -std=c99 -Wno-char-subscripts
+
+ZIP	:= README.txt prog-w64.exe prog-test.sh avgtime.sh makeholes-w64.exe
+
+.c$O :
+	${CC} ${CFLAGS} -c $<
+
+.c$E :
+	$(CC) $(CFLAGS) $(LDFLAGS) -o$* $<
+
+$O :
+	$(LD) $(LDFLAGS) -o$* $*$O
+
+.c.i:
+	${CC} -E ${CFLAGS} $*.c >$*.i
+
+########################################################################
+
+all: build
+
+build: prog
+
+clean:
+	-rm prog *.exe *.i *$O *.tmp *.rej *.orig *.core *.out 2>/dev/null
+
+distclean: clean
+
+prog: prog.c
+	${CC} ${CFLAGS} ${LDFLAGS} -o$@ prog.c
+
+prog-w64: err.h prog.c
+	${W64CC} ${W64CFLAGS} ${LDFLAGS} -o$@ prog.c
+
+test:
+	${SHELL} ${top_srcdir}/prog-test.sh
+
+test-w64:
+	${SHELL} ${top_srcdir}/prog-test.sh -w
diff --git a/2019/karns/Makefile b/2019/karns/Makefile
index e7a66e012..ebcf1f63a 100644
--- a/2019/karns/Makefile
+++ b/2019/karns/Makefile
@@ -68,7 +68,7 @@ CINCLUDE=
 
 # Optimization
 #
-OPT= 
+OPT=
 
 # Default flags for ANSI C compilation
 #