D472: extensions: make wrapfunction() return a context manager

[martinvonz (Martin von Zweigbergk)]

martinvonz added a comment.


  I failed with the update of this patch, so see https://phab.mercurial-scm.org/D563 instead

REPOSITORY
  rHG Mercurial

REVISION DETAIL
  https://phab.mercurial-scm.org/D472

To: martinvonz, #hg-reviewers, quark, mjpieters
Cc: yuja, lothiraldan, quark, mjpieters, mercurial-devel