Mike McQuaid 426737eb9e outdated: allow passing formulae as arguments.
If formulae names are passed as arguments check if just they are outdated. Additionally, return a failed code if they are outdated.

This will hopefully be able to stop people complaining about the outdated error code as they can now just run e.g.:
`brew outdated git && brew upgrade git`

Closes Homebrew/homebrew#31242.

Signed-off-by: Mike McQuaid <mike@mikemcquaid.com>
2014-08-01 17:46:05 +02:00
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