D934: rebase: add an experimental.showhashchanges config to show hash changes

[durin42 (Augie Fackler)]

durin42 added a comment.


  I see what it does, but why? What's the motivation for the feature?

REPOSITORY
  rHG Mercurial

REVISION DETAIL
  https://phab.mercurial-scm.org/D934

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