ruby-grape / grape / 28751727639 / 12

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master: 97%

Pull #2784

github

Move HEAD route creation into Grape::Router::Route#to_head

`Endpoint#mount_in` built the HEAD variant of a GET route inline: dup the
route, flip its request method, then apply and append it. Duplicating a
route and turning it into a HEAD request is the route's own concern, not
the endpoint's.

Add `Route#to_head`, which returns a fresh HEAD copy of the route, and
demote `convert_to_head_request!` to `protected` now that `to_head` is
its only caller. `mount_in` keeps the decision of whether to add a HEAD
route (the `do_not_route_head` setting and the GET check) and just calls
`route.to_head.apply(self)`.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

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