patchbomb: ensure all headers and values given to email mod are native strings...
patchbomb: ensure all headers and values given to email mod are native strings
This lets test-patch-bookmark.t only fail with some harmless header
output changes on Python 3, so I think patchbomb might be basically
useful on Python 3 now.
Differential Revision:
https://phab.mercurial-scm.org/D3952
