Message 57177 - Python tracker

I see several problems with this, but there's light at the end of the
tunnel.

(1) Don't use s#; it will allow null bytes in the string, which we don't
want.

(2) Put the entire trailing slash removal inside #ifdef MS_WINDOWS.

(3) Careful!  It seems the code you wrote would transform "C:/" into
"C:" which isn't the same thing (the latter refers to the current
directory on the C drive, while the former is the root of the C drive).