D5769: tests: alter email `From` line to a value that's consistently parsed

[durin42 (Augie Fackler)]

durin42 planned changes to this revision.
durin42 added a comment.


  Oops. I'll be back to this.

REPOSITORY
  rHG Mercurial

REVISION DETAIL
  https://phab.mercurial-scm.org/D5769

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