rust-lang/cargo — pull request #667 by jakerr (2014-10-05 07:02:43+00:00)
Title: Let the help command work consistently everywhere

This adds a dummy help command so that it's usage can be documented with docopt! This lets `cargo help help` work.

Also adds help flags to all of the subcommands that were missing them. Without
that `cargo help sub-command` shows Invalid Argument before the usage text.