D1809: tests: switch test from '--config ui.editor=~/foo' to HGEDITOR=~/foo

[krbullock (Kevin Bullock)]

krbullock accepted this revision.
krbullock added a comment.
This revision is now accepted and ready to land.


  Queued, thanks

REPOSITORY
  rHG Mercurial

REVISION DETAIL
  https://phab.mercurial-scm.org/D1809

To: spectral, #hg-reviewers, krbullock
Cc: krbullock, mercurial-devel