help: always show command help with -h (issue4240) Old behavior: hg help x hg x -h hg help -e x hg help -c x config topic topic (!) - cmd showconfig cmd topic (!) - cmd rebase cmd cmd ext cmd New behavior: hg help x hg x -h hg help -e x hg help -c x config topic cmd - cmd showconfig cmd cmd - cmd rebase cmd cmd ext cmd