Fix optional argument rendering in OCaml 5.5 - #1489
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For a module with no mli, OCaml 5.5 wraps the argument types of the inferred arrows in a trivial Tpoly node, which stops odoc recognising the option beneath it: the arguments are marked RawOptional and render as `?force:???`. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
From 5.5 the compiler wraps the argument types of inferred arrows in a trivial Tpoly node, so the loader no longer saw the option constructor and marked the arguments RawOptional, rendering them as `?arg:???`. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
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In OCaml 5.5, optional arguments get wrapped in a
TPolyconstructor, confusing odoc. This results in rendering values such as:This PR fixes this by unwrapping them from the TPoly.