$ . "$TESTDIR/helper.sh"

-h should output usage information and exit 0

  $ lsrc -h
  Usage: lsrc [-FVqvh] [-I EXCL_PAT] [-x EXCL_PAT] [-N EXCL_PAT ] [-t TAG] [-d DOT_DIR]
  see lsrc(1) and rcm(5) for more details