py3: use '%d' instead of '%s' for integers

Python 3 does not allow to use '%s' for integers.

Differential Revision: https://phab.mercurial-scm.org/D4688

mercurial/commands.py

@@ -4878,10 +4878,10 b' def revert(ui, repo, *pats, **opts):'
         if node != parent:
             if dirty:
                 hint = _("uncommitted changes, use --all to discard all"
-                         " changes, or 'hg update %s' to update") % ctx.rev()
+                         " changes, or 'hg update %d' to update") % ctx.rev()
             else:
                 hint = _("use --all to revert all files,"
-                         " or 'hg update %s' to update") % ctx.rev()
+                         " or 'hg update %d' to update") % ctx.rev()
         elif dirty:
             hint = _("uncommitted changes, use --all to discard all changes")
         else: