Add 1995/leo/try.sh and update bugs.md

There appears to be a bug where the program blocks. In one case another
command makes it work but the judges remarks suggest one way and it does
not. The other command does not seem to work at all, even if used like
the workaround with the first one.

Updated make clobber to remove foo.ps.

Updated .gitignore.

thanks-for-help.md

@@ -2061,7 +2061,9 @@ added.
 
 ## <a name="1995_leo"></a>[1995/leo](/1995/leo/leo.c) ([README.md](/1995/leo/README.md]))
 
-At our change in how to deal with spoilers, [Cody](#cody) uudecoded the spoiler provided
+[Cody](#cody) added the [try.sh](/1995/leo/try.sh) script.
+
+At our change in how to deal with spoilers, Cody also uudecoded the spoiler provided
 by the author, putting it in [spoiler1.md](/1995/leo/spoiler1.md).