tests/test-gendoc-pt_BR.t

dagutil: use a listcomp instead of a map()

In Python 3, the map() returns a generator object instead of a list,
and some parts of hg depend on this being consumable more than once or
sortable in place.

Differential Revision: https://phab.mercurial-scm.org/D1099

#require docutils gettext

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