ok stsp

This brings the rest of the regression test scripts in line with patch.sh.

Fixes regression introduced by commit 41f061b2f459318f3738f59d7676efccc4beb344 where tracked files inside an ignored directory were reported as missing.

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@

In order to portably handle the difference in how 'sed -i' works between *BSD and Linux, provide a wrapper to invoke the underying system sed(1) based on which OSTYPE is in use.

To minimise the amount of churn between the difference in date(1) and ln(n) semantics, use gdate and gln from coreutils.

GNU ln uses -T instead of -h for no-target-directory. OK thomas.adam

Escape sequences are not handled by every echo(1), e.g. not on FreeBSD. '?' is a glob character and must be quoted. '!' is not a shell meta character. ok tracey stsp

ok tracey

ok stsp

Advantages over using grep are that the list of codes is validated against a list of known status codes, and that it is easier to match staged files which can display status codes in one or both of two columns. Prompted by feedback from krw@

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

Problem reported by semarie, who also provided initial regression test code. ok semarie

ok millert@