…d parenthesis

Keeping the link target around is redundant as `rustdoc` already infers
this from the link name, after removing the backticks.  It uses the
call-parenthesis to enforce that the link target is indeed an `fn`
(and not some other item).

…link

…y_ptr()`

This moved for the server but not the client `Backend`, and because of
not being a link nor validated in the CI this broken reference wasn't
noticed.