D2588: commit: adds multiline commit message support(issue5616)

[durin42 (Augie Fackler)]

durin42 added inline comments.

INLINE COMMENTS

> pulkit wrote in test-commit.t:847
> starting with a newline seems awkward.

agreed

REPOSITORY
  rHG Mercurial

REVISION DETAIL
  https://phab.mercurial-scm.org/D2588

To: sangeet259, #hg-reviewers
Cc: durin42, tom.prince, yuja, pulkit, jeffpc, mercurial-devel