Format/typo check 1993/ant

Format/typo check README.md.

Format/typo check ant.txt. I kept the terms the same like 'period' for
'.' as I believe that's the way it is in POSIX (even though I'd prefer
dot or full stop). I added in parentheses some symbols where they were
missing and there was a typo here and there. I was considering adding 's
round some characters to make things stand out a bit better but I did
not do that. If that's useful it can be done another time.

The bugs.md has been updated as well, both with INABIAF and missing file
statuses.

I believe that this completes 1993/ant the 's idea noted above
notwithstanding.

bugs.md

@@ -999,6 +999,29 @@ not a misunderstanding).
 # 1993
 
 
+### STATUS: INABIAF - please **DO NOT** fix
+### Source code: [1993/ant/ant.c](1993/ant/ant.c)
+### Information: [1993/ant/README.md](1993/ant/README.md)
+
+The author stated that:
+
+```
+The expression `(a*)*` compiles but loops forever.
+
+There is no check for trailing backslash (`\`) in the pattern.
+
+There is no check for unbalanced brackets.  Omitting a closing bracket
+will generate a "Pattern too long" error, which is not the real error.
+```
+
+
+### STATUS: missing file - please provide it
+
+The author wrote in the documentation file [ant.txt](1993/ant/ant.txt) that
+there is a version of the code that is not obfuscated. This file, `agag.c` does
+not exist in the archive. Do you have it? Please provide it!
+
+
 ### STATUS: known bug - please help us fix
 ### Source code: [1993/cmills/cmills.c](1993/cmills/cmills.c)
 ### Information: [1993/cmills/README.md](1993/cmills/README.md)