rustdoc: Can't click any links in methods that use `details`

[camelid]

For example, I can't click any links (i.e., when I click them, nothing happens) in this method's header. Likewise, I can't click any links for make_async_expr, but I can click links in wrap_in_try_constructor, which has no details tag.

This same behavior occurs in the std docs, though every std method is documented and thus has a details tag, so there's no comparison to non-details methods.

This is a regression in nightly 1.58.0. I'm using Safari on macOS; I don't know if this reproduces on other browsers.

[jyn514]

This is probably #91103; I don't know why that change was made or if this is intentional.

cc @Manishearth @jsha

[camelid]

I can't imagine this part of the behavior is intentional, since it breaks a lot of rustdoc's UI.

[camelid]

We really need more GUI tests so this can't happen again...

[jsha]

Can confirm, that wasn't intentional. I manually checked during development to make sure that wouldn't happen, but it must have broken. Sorry for that, and sorry for not adding a GUI test for it. I'll post a fix in a moment.