D6597: rust-2018: switch hg-core and hg-cpython to rust 2018 edition

[pulkit (Pulkit Goyal)]

pulkit added a comment.


  Can you add link of mailing list thread in your commit message? Link from markmail or https://www.mercurial-scm.org/pipermail/mercurial-devel/.

REPOSITORY
  rHG Mercurial

CHANGES SINCE LAST ACTION
  https://phab.mercurial-scm.org/D6597/new/

REVISION DETAIL
  https://phab.mercurial-scm.org/D6597

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