bookmarks: Add -B option to incoming/outgoing to compare bookmarks
We add a -B/--bookmarks option to hg incmoing and hg outgoing. If the option
is passed we compare bookmarks instead of changesets. This can be used
to see which bookmarks do not exists on the remote site.
discovery: use stable sort order in --new-branch warning
A Python set seems to do this already when you iterate over it, but
this should be considered an implementation detail and not something
we can rely on.
This also gets rid of an unnecessary string conversion -- the set
already contains strings.
i18n-pt_BR: synchronized with
b4467a7d5c75