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

util.parsedate() returns a tuple of integers. Writing this patch, I wish we had
some type hinting.

Differential Revision: https://phab.mercurial-scm.org/D2412

hgext/mq.py

@@ -1265,7 +1265,7 b' class queue(object):'
                     if user:
                         ph.setuser(user)
                     if date:
-                        ph.setdate('%s %s' % date)
+                        ph.setdate('%d %d' % date)
                     ph.setparent(hex(nctx.p1().node()))
                     msg = nctx.description().strip()
                     if msg == defaultmsg.strip():