Consider improving output for `chalk help help` and `chalk help --help`

[ee7]

Description

These commands output the same thing:

• chalk
• chalk help
• chalk --help
• chalk help --help

But the output of chalk help help outputs the same information twice.

Chalk lists help as a command in chalk help commands, and says to run chalk help "cmdname" to get help for a command. So a user may try to run chalk help help or chalk help --help to get extra information about using the help command.

Impact

Low impact:

• A user who runs chalk help help gets duplicated output.
• A user who runs chalk help help or chalk help --help doesn't get help for the help command.

Steps to Reproduce

Run chalk help help with the latest chalk release (0.3.1).

Other information