tests/test-gendoc-it.t

serve: add option print-url

It can be used to open hgweb in a web browser. Example :
xdg-open "`hg serve --print-url`".

Differential Revision: https://phab.mercurial-scm.org/D3649

#require docutils gettext

  $ $TESTDIR/check-gendoc it
  checking for parse errors