Corrected the related parameter lookup on request params.

[Jack12816]

- What is it good for

There is a nasty bug while using grape-swagger on request parameters that share the same base name in any way (eg. ids and user_ids) which results in a missing parameter and a badly named on (eg. ids is missing, while user_ids[][] is renamed to). An example Grape API class looks like this:

class Search < Grape::API
  params do
    with(allow_blank: false) do
      optional :ids, type: [String]
      optional :user_ids, type: [String]
    end
  end
  # [..]
end          

- What I did

I just changed the related parameter matching to use start_with? instead of include? to be sure that the related parameter is not accidentally matched while respecting actual matches. (eg. user_id and user_id[id])

- A picture of a cute animal (not mandatory but encouraged)

[LeFnord]

thank @Jack12816 … did it need an upgrade entry?

[LeFnord]

ah … one more thing, please add an CHANGELOG.md entry

[Jack12816]

did it need an upgrade entry?

I don't think so, the expected behavior remains and this pr just fixes an edge case, but if you insist I'll can add an upgrade note :)

one more thing, please add an CHANGELOG.md entry

done

[LeFnord]

will update the branch, then doing the mörge

[LeFnord]

thanks :)

[Jack12816]

thank you, too! :) - what do you think about a release?

[Jack12816]

@LeFnord ping 🏓