nodemap: make sure the nodemap docket is updated after the changelog
It is better to have a lagging nodemap than a nodemap pointing to node that does
not exists yet.
(strictly speaking, the order was already right, however we make it more
explicit).
Differential Revision: https://phab.mercurial-scm.org/D8188
#require docutils gettext
$ $TESTDIR/check-gendoc fr
checking for parse errors