D5514: test: change test's diff generation to use mdiff for nicer output

[sangeet259 (Sangeet Kumar Mishra)]

sangeet259 added a comment.


  @durin42 So the `try/except` will fall back to `unified diff`?
  Is there a way we can enforce this on system's that don't have mercurial installed globally and not have to fall back on the earlier practice.
  
  Also, I didn't get your comment on checking the API of `mdiff` :/

REPOSITORY
  rHG Mercurial

REVISION DETAIL
  https://phab.mercurial-scm.org/D5514

To: sangeet259, #hg-reviewers, durin42
Cc: pulkit, durin42, mercurial-devel