[PATCH 3 of 4] commands: use Oxford comma (help clone)

[timeless]

# HG changeset patch
# User timeless <timeless at mozdev.org>
# Date 1448911786 0
#      Mon Nov 30 19:29:46 2015 +0000
# Node ID d400a9c4ec6cb3b07248e9287251c44809fe42ce
# Parent  c6ffc4847ba2f260943c0cd3a9dbd058a080f266
commands: use Oxford comma (help clone)

diff --git a/mercurial/commands.py b/mercurial/commands.py
--- a/mercurial/commands.py
+++ b/mercurial/commands.py
@@ -1417,7 +1417,8 @@
 @command('^clone',
     [('U', 'noupdate', None, _('the clone will include an empty working '
                                'directory (only a repository)')),
-    ('u', 'updaterev', '', _('revision, tag or branch to check out'), _('REV')),
+    ('u', 'updaterev', '', _('revision, tag, or branch to check out'),
+        _('REV')),
     ('r', 'rev', [], _('include the specified changeset'), _('REV')),
     ('b', 'branch', [], _('clone only the specified branch'), _('BRANCH')),
     ('', 'pull', None, _('use pull protocol to copy metadata')),