D2367: narrowcommands: add some missing strkwargs calls for py3

[indygreg (Gregory Szorc)]

indygreg requested changes to this revision.
indygreg added a comment.
This revision now requires changes to proceed.


  Let's do what @pulkit said.

REPOSITORY
  rHG Mercurial

REVISION DETAIL
  https://phab.mercurial-scm.org/D2367

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