outgoing: accept revset argument for --rev

There may be a more generic way that would add revset support to more commands
by adding revset support to addbranchrevs(), but given the proximity of the next
code freeze, a minimal change seems like the better choice.

mercurial/hg.py

@@ -518,7 +518,7 b' def _outgoing(ui, repo, dest, opts):'
     ui.status(_('comparing with %s\n') % util.hidepassword(dest))
     revs, checkout = addbranchrevs(repo, repo, branches, opts.get('rev'))
     if revs:
-        revs = [repo.lookup(rev) for rev in revs]
+        revs = [repo.lookup(rev) for rev in scmutil.revrange(repo, revs)]
 
     other = peer(repo, opts, dest)
     outgoing = discovery.findcommonoutgoing(repo, other, revs,

tests/test-phases.t

@@ -112,7 +112,7 b' Test secret changeset are not pushed'
   2 draft C
   3 draft D
   6 draft B'
-  $ hg outgoing -r default ../push-dest --template='{rev} {phase} {desc|firstline}\n'
+  $ hg outgoing -r 'branch(default)' ../push-dest --template='{rev} {phase} {desc|firstline}\n'
   comparing with ../push-dest
   searching for changes
   0 public A