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@

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.

positive feedback from Omar and kn ok kn

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

ok tracey

ok stsp

ok stsp

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

ok semarie

ok millert@