brew search --verbose to tell about brew desc

[abitrolly]

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brew search doesn't include package descriptions in the output, so even when a package matches, it is hard to tell if it does what is needed. In the proposal to add package descriptions into search -v output #11932 I've discovered that there is a separate brew desc search command that does exactly this. So per discussion #11932 (comment) this is the PR that adds hint to use brew desc if search is supplied with --verbose.

(hit this problem again today and forgot about desc already)

[MikeMcQuaid]

Great work so far! Some suggested wording tweaks.

[MikeMcQuaid]

Thanks so much for your first contribution! Without people like you submitting PRs we couldn't run this project. You rock, @abitrolly!

[abitrolly]

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