contrib: tweak import-checker to always use bytes for module names
We could go the other route and make embedded() return this as a
bytes, but then it would be harder to portably doctest, so I prefer
this option.
Differential Revision: https://phab.mercurial-scm.org/D5206
$ echo "[extensions]" >> $HGRCPATH
$ echo "mq=" >> $HGRCPATH
$ hg init
$ echo 'base' > base
$ hg ci -Ambase
adding base
$ hg qnew -mmqbase mqbase
$ hg qsave
$ hg qrestore 2
restoring status: hg patches saved state