convert markdown copyright TAB chars into SPACE chars

While not strictly necessary, replacing the two ASCII tab characters
in the markdown copyright comment makes it easier to detect problematic
TAB indentation within markdown files.

After this commit, only 90 markdown files have leading ASCII TAB
characters.  And again, while not strictly necessary, we can consider
running expand on those 90 markdown files to see what effect that
might have on the HTML files they produce.

Replace leading ASCII TAB characters with multiples of 8 ASCII SPACE
characters (the default action of the `expand(1)` tool) might have
an negative effect on some HTML formatting where **hack-a-round**
formatting was attempted to fix broken indentation caused by
problematic ASCII TAB characters.

Think of this as a baseline for evaluating leading
TAB characters within markdown files.

TODO: Consider either using `expand(1)` to replace leading ASCII
TAB characters with multiples of 8 ASCII SPACE characters AND/OR
modifying the appropriate `bin` tool to convert leading ASCII TAB
characters into multiples of 8 ASCII SPACE characters.

1990/README.md

@@ -38,10 +38,10 @@ See also [the IOCCC FAQ](../faq.html) for additional information on the IOCCC.
 
     You are free to share and adapt this file under the terms of this license:
 
-	Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0)
+        Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0)
 
     For more information, see:
 
-	https://creativecommons.org/licenses/by-sa/4.0/
+        https://creativecommons.org/licenses/by-sa/4.0/
 
 -->

1990/baruch/README.md

@@ -106,10 +106,10 @@ to replace the `" #Q"` string with `" \261\2"`.
 
     You are free to share and adapt this file under the terms of this license:
 
-	Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0)
+        Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0)
 
     For more information, see:
 
-	https://creativecommons.org/licenses/by-sa/4.0/
+        https://creativecommons.org/licenses/by-sa/4.0/
 
 -->

1990/baruch/index.html

@@ -523,11 +523,11 @@ Jump to: <a href="#">top</a>
 
     You are free to share and adapt this file under the terms of this license:
 
-	Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0)
+        Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0)
 
     For more information, see:
 
-	https://creativecommons.org/licenses/by-sa/4.0/
+        https://creativecommons.org/licenses/by-sa/4.0/
 
 -->
 

1990/cmills/README.md

@@ -56,10 +56,10 @@ times, and it will show all hands as they are played.
 
     You are free to share and adapt this file under the terms of this license:
 
-	Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0)
+        Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0)
 
     For more information, see:
 
-	https://creativecommons.org/licenses/by-sa/4.0/
+        https://creativecommons.org/licenses/by-sa/4.0/
 
 -->

1990/cmills/index.html

@@ -488,11 +488,11 @@ Jump to: <a href="#">top</a>
 
     You are free to share and adapt this file under the terms of this license:
 
-	Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0)
+        Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0)
 
     For more information, see:
 
-	https://creativecommons.org/licenses/by-sa/4.0/
+        https://creativecommons.org/licenses/by-sa/4.0/
 
 -->
 

1990/dds/README.md

@@ -124,10 +124,10 @@ fits in an `80*25` screen).
 
     You are free to share and adapt this file under the terms of this license:
 
-	Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0)
+        Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0)
 
     For more information, see:
 
-	https://creativecommons.org/licenses/by-sa/4.0/
+        https://creativecommons.org/licenses/by-sa/4.0/
 
 -->

1990/dds/index.html

@@ -549,11 +549,11 @@ Jump to: <a href="#">top</a>
 
     You are free to share and adapt this file under the terms of this license:
 
-	Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0)
+        Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0)
 
     For more information, see:
 
-	https://creativecommons.org/licenses/by-sa/4.0/
+        https://creativecommons.org/licenses/by-sa/4.0/
 
 -->
 

1990/dg/README.md

@@ -70,10 +70,10 @@ with `16` to translate, and output, otherwise pass it unchanged.
 
     You are free to share and adapt this file under the terms of this license:
 
-	Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0)
+        Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0)
 
     For more information, see:
 
-	https://creativecommons.org/licenses/by-sa/4.0/
+        https://creativecommons.org/licenses/by-sa/4.0/
 
 -->

1990/dg/index.html

@@ -491,11 +491,11 @@ Jump to: <a href="#">top</a>
 
     You are free to share and adapt this file under the terms of this license:
 
-	Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0)
+        Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0)
 
     For more information, see:
 
-	https://creativecommons.org/licenses/by-sa/4.0/
+        https://creativecommons.org/licenses/by-sa/4.0/
 
 -->
 

1990/index.html

@@ -469,11 +469,11 @@ Jump to: <a href="#">top</a>
 
     You are free to share and adapt this file under the terms of this license:
 
-	Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0)
+        Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0)
 
     For more information, see:
 
-	https://creativecommons.org/licenses/by-sa/4.0/
+        https://creativecommons.org/licenses/by-sa/4.0/
 
 -->
 

1990/jaw/README.md

@@ -230,10 +230,10 @@ To which we add:
 
     You are free to share and adapt this file under the terms of this license:
 
-	Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0)
+        Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0)
 
     For more information, see:
 
-	https://creativecommons.org/licenses/by-sa/4.0/
+        https://creativecommons.org/licenses/by-sa/4.0/
 
 -->

1990/jaw/index.html

@@ -621,11 +621,11 @@ Jump to: <a href="#">top</a>
 
     You are free to share and adapt this file under the terms of this license:
 
-	Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0)
+        Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0)
 
     For more information, see:
 
-	https://creativecommons.org/licenses/by-sa/4.0/
+        https://creativecommons.org/licenses/by-sa/4.0/
 
 -->
 

1990/pjr/README.md

@@ -98,10 +98,10 @@ to the reader to find out what it is.
 
     You are free to share and adapt this file under the terms of this license:
 
-	Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0)
+        Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0)
 
     For more information, see:
 
-	https://creativecommons.org/licenses/by-sa/4.0/
+        https://creativecommons.org/licenses/by-sa/4.0/
 
 -->

1990/pjr/index.html

@@ -501,11 +501,11 @@ Jump to: <a href="#">top</a>
 
     You are free to share and adapt this file under the terms of this license:
 
-	Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0)
+        Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0)
 
     For more information, see:
 
-	https://creativecommons.org/licenses/by-sa/4.0/
+        https://creativecommons.org/licenses/by-sa/4.0/
 
 -->
 

1990/scjones/README.md

@@ -59,10 +59,10 @@ would allow for sequence numbers to be punched in columns 73-80 :-).
 
     You are free to share and adapt this file under the terms of this license:
 
-	Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0)
+        Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0)
 
     For more information, see:
 
-	https://creativecommons.org/licenses/by-sa/4.0/
+        https://creativecommons.org/licenses/by-sa/4.0/
 
 -->

1990/scjones/index.html

@@ -493,11 +493,11 @@ Jump to: <a href="#">top</a>
 
     You are free to share and adapt this file under the terms of this license:
 
-	Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0)
+        Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0)
 
     For more information, see:
 
-	https://creativecommons.org/licenses/by-sa/4.0/
+        https://creativecommons.org/licenses/by-sa/4.0/
 
 -->
 

1990/stig/README.md

@@ -54,10 +54,10 @@ K&R support nested comments when properly implemented, but what the heck.
 
     You are free to share and adapt this file under the terms of this license:
 
-	Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0)
+        Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0)
 
     For more information, see:
 
-	https://creativecommons.org/licenses/by-sa/4.0/
+        https://creativecommons.org/licenses/by-sa/4.0/
 
 -->

1990/stig/index.html

@@ -486,11 +486,11 @@ Jump to: <a href="#">top</a>
 
     You are free to share and adapt this file under the terms of this license:
 
-	Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0)
+        Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0)
 
     For more information, see:
 
-	https://creativecommons.org/licenses/by-sa/4.0/
+        https://creativecommons.org/licenses/by-sa/4.0/
 
 -->
 

1990/tbr/README.md

@@ -192,10 +192,10 @@ all `ed(1)` does too.
 
     You are free to share and adapt this file under the terms of this license:
 
-	Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0)
+        Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0)
 
     For more information, see:
 
-	https://creativecommons.org/licenses/by-sa/4.0/
+        https://creativecommons.org/licenses/by-sa/4.0/
 
 -->

1990/tbr/index.html

@@ -578,11 +578,11 @@ Jump to: <a href="#">top</a>
 
     You are free to share and adapt this file under the terms of this license:
 
-	Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0)
+        Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0)
 
     For more information, see:
 
-	https://creativecommons.org/licenses/by-sa/4.0/
+        https://creativecommons.org/licenses/by-sa/4.0/
 
 -->
 

1990/theorem/README.md

@@ -133,10 +133,10 @@ lines, each less than 99 characters long.
 
     You are free to share and adapt this file under the terms of this license:
 
-	Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0)
+        Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0)
 
     For more information, see:
 
-	https://creativecommons.org/licenses/by-sa/4.0/
+        https://creativecommons.org/licenses/by-sa/4.0/
 
 -->

1990/theorem/index.html

@@ -527,11 +527,11 @@ Jump to: <a href="#">top</a>
 
     You are free to share and adapt this file under the terms of this license:
 
-	Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0)
+        Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0)
 
     For more information, see:
 
-	https://creativecommons.org/licenses/by-sa/4.0/
+        https://creativecommons.org/licenses/by-sa/4.0/
 
 -->
 

1990/westley/README.md

@@ -106,10 +106,10 @@ Also obviously, `(char)lotte` and `(char*)lie` are incompatible types...
 
     You are free to share and adapt this file under the terms of this license:
 
-	Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0)
+        Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0)
 
     For more information, see:
 
-	https://creativecommons.org/licenses/by-sa/4.0/
+        https://creativecommons.org/licenses/by-sa/4.0/
 
 -->

1990/westley/index.html

@@ -511,11 +511,11 @@ Jump to: <a href="#">top</a>
 
     You are free to share and adapt this file under the terms of this license:
 
-	Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0)
+        Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0)
 
     For more information, see:
 
-	https://creativecommons.org/licenses/by-sa/4.0/
+        https://creativecommons.org/licenses/by-sa/4.0/
 
 -->