D5543: histedit: crashing with a more useful error message on empty defaultrev

[rdamazio (Rodrigo Damazio Bovendorp)]

rdamazio added a comment.


  (and btw I'd be happier with '' meaning the default, but the original author went through the trouble of checking both cases explicitly, so I kept that)

REPOSITORY
  rHG Mercurial

REVISION DETAIL
  https://phab.mercurial-scm.org/D5543

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