narrowcommands: add some missing strkwargs calls for py3
# skip-blame because it's just r prefixes
Differential Revision: https://phab.mercurial-scm.org/D2367
narrowwirepeer: add some strkwargs to fix a crash on py3
# skip-blame because it's just some r prefixes
Differential Revision: https://phab.mercurial-scm.org/D2366