D6082: phabricator: add a `--branch` flag to `hg phabsend`

[pulkit (Pulkit Goyal)]

pulkit added a comment.


  @mharbison72 thanks for tips on adding test. Will add tests in next iteration.
  
  I found that Differentials do have a branch field, maybe we can use that? https://secure.phabricator.com/source/phabricator/browse/master/src/applications/differential/customfield/DifferentialBranchField.php

REPOSITORY
  rHG Mercurial

REVISION DETAIL
  https://phab.mercurial-scm.org/D6082

To: pulkit, #hg-reviewers
Cc: mharbison72, mercurial-devel