man tail is using --follow=something several times. My understanding is that
the tail command will accept such usage. It does not.

    $ tail --follow=nosuchfile
    tail: invalid argument ‘nosuchfile’ for ‘--follow’
    Valid arguments are:
      - ‘descriptor’
      - ‘name’
    Try 'tail --help' for more information.

    $ tail --follow nosuchfile
    tail: cannot open 'nosuchfile' for reading: No such file or directory
    tail: no files remaining

I would say either tail manual page, or tail itself, should be fixed.