Re: git reveals a bug in (some versions) BSD diff

Johannes Schindelin [off-list ref] writes:

I'd prefer to deprecate that diff program by telling so in the test. 
Something along the lines "blabla. If this fails, chances are you have a 
borked diff. Try GNU diff..."

Wouldn't it give the people with broken diff a false impression
that their "git diff" actually produces a good result when it
does not?