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

[pulkit (Pulkit Goyal)]

pulkit added a comment.


  > If you couldn't follow those steps, you can simply check the diffs here:
  > 
  > test's diff: https://pastebin.com/Z4LRg4vx
  >  diff used by hg diff: https://pastebin.com/qanQEsiA
  
  Can you make the diffs a part of commit message since pastebin's pastes can be removed in future?

REPOSITORY
  rHG Mercurial

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

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