intridea/grape — pull request #565 by wyattisimo (2014-01-30 18:05:17+00:00)
Title: recognize Array type declarations that also specify the type of elements

When a parameter declaration specifies the array element type for validation (e.g. `type: [Integer]`), then `type` is actually equal to `Class` because it **is** an array, so we need to also evaluate `type.is_a?(Array)`.