doc:sphinx: fix parse-header description
authorFederico Vaga <federico.vaga@vaga.pv.it>
Tue, 5 Jun 2018 22:48:59 +0000 (00:48 +0200)
committerJonathan Corbet <corbet@lwn.net>
Tue, 26 Jun 2018 15:07:57 +0000 (09:07 -0600)
commitf3821276f62c80184f4b7543e423ec5c7f43bbe1
tree23e989cedbcc4c6fec5a9377c1691b8a0c1e2346
parentc1ec85ff408db77f5c97ae71b8854faed40e89f1
doc:sphinx: fix parse-header description

The description speaks about the option ``--man`` but it
does not exist. Instead, there is the option ``--usage``

    $ ./Documentation/sphinx/parse-headers.pl --man
    Unknown option: man
    Usage:
        parse_headers.pl [<options>] <C_FILE> <OUT_FILE> [<EXCEPTIONS_FILE>]

        Where <options> can be: --debug, --help or --man.

Signed-off-by: Federico Vaga <federico.vaga@vaga.pv.it>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Documentation/doc-guide/parse-headers.rst
Documentation/sphinx/parse-headers.pl