Since the interpreter for the regress shell scripts are using /bin/sh this will usually imply some level of POSIX compliance (that isn't bash-specific, for instance). Some systems use dash as their sh shell and as such is stricter POSIX compliance. To help -portable, make the shell test checks use a single '=' for equality, rather than '=='.

This is important in cases like 'got diff file.txt file.txt' which should only show the diff for file.txt once. suggested by kn@

Need for filtering by path sugggested by kn@ ok naddy@

positive feedback from Omar and kn ok kn

ok tracey

ok stsp

ok stsp

Previous default output remains when test cases are run individually. ok tracey

ok semarie

ok millert@