Re: [bug-diffutils] bug#16848: diff reports a diff on identical lines

[Paul Eggert]

On 02/24/2014 11:31 AM, Jim Meyering wrote:
> If you find the time, would you please also add a test case like the
> one Vincent posted?
I'm afraid that'd be iffy, as there was no bug -- in the test case, 
'diff' had correct behavior.  In general, there are a lot of correct 
outputs for 'diff', and I'm leery of test cases that would require a 
particular behavior when the exact choice isn't obvious.I suppose we 
could use his test case and make sure that 'diff' doesn't generate the 
obviously-suboptimal output, but the value of such a test case would be 
relatively small, that is, almost surely the test case wouldn't catch 
similar bugs in the future.