cmdutil: fix amend when passing a date Following https://phab.mercurial-scm.org/D636, passing the same date that the changeset to amend would results in no new commits but the output changed from: $ hg amend -d '0 0' nothing changed [1] to: $ hg amend -d '0 0' Restore the old behavior by parsing the date passed as parameter so the condition "date == old.date()" correctly works in cases both dates are identical. Add a test for covering this regression. This bug was found thanks to Evolve test suite. Differential Revision: https://phab.mercurial-scm.org/D691

--- a/tests/test-amend.t	Tue Sep 12 11:18:35 2017 -0400
+++ b/tests/test-amend.t	Mon Sep 11 18:07:29 2017 +0200
@@ -85,6 +85,14 @@
   nothing changed
   [1]
 
+  $ hg amend -d "0 0"
+  nothing changed
+  [1]
+
+  $ hg amend -d "Thu Jan 01 00:00:00 1970 UTC"
+  nothing changed
+  [1]
+
 Matcher and metadata options
 
   $ echo 3 > C