Fix formatting in README.md.
Removed statement of judges that they fixed it for modern compilers that
object to 's' added to an int for short int as this is what I did and
the source that was imported had not been fixed though this might have
been a simple mistake. I had not noticed this before.
Update bugs.md: a known bug and one INABIAF (crashes on no arg).
Added alt code with the 1s as it's instructive to show what was once
allowed but is not now.
