As discussed in bbatsov/rubocop#3344, there are situations where
this is the shortest and most idiomatic way to convert a value
to a boolean - particularly for checking values which can be
nil or truthy.
This is the (partially) documented public API for Homebrew.
The main class you should look at is the {Formula} class (and classes linked from there). That's the class that's used to create Homebrew formulae (i.e. package descriptions). Assume anything else you stumble upon is private.
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