docs: def find_repositories_with_locate(path):
      """Use locate to return a sequence of (directory, dotdir) pairs."""
      command = [b'locate', b'-0']
      for dotdir in DOTDIRS:
          # Escaping the slash (using '\/' rather than '/') is an
          # important signal to locate(1) that these glob patterns are
          # supposed to match the full path, so that things like
          # '.hgignore' files do not show up in the result.
          command.append(br'%s\/%s' % (escape(path), escape(dotdir)))
          command.append(br'%s\/*/%s' % (escape(path), escape(dotdir)))
      try:
          paths = check_output(command).strip(b'\0').split(b'\0')
      except CalledProcessError:
          return []
      return [os.path.split(p) for p in paths
              if not os.path.islink(p) and os.path.isdir(p)]