hg: better wrapping of string literal

mercurial/hg.py

@@ -277,9 +277,9 b' def clone(ui, source, dest=None, pull=Fa'
             revs = None
             if rev:
                 if 'lookup' not in src_repo.capabilities:
-                    raise util.Abort(_("src repository does not support revision "
-                                       "lookup and so doesn't support clone by "
-                                       "revision"))
+                    raise util.Abort(_("src repository does not support "
+                                       "revision lookup and so doesn't "
+                                       "support clone by revision"))
                 revs = [src_repo.lookup(r) for r in rev]
                 checkout = revs[0]
             if dest_repo.local():