Rustdoc: static methods have self argument in search-index

[mitaa]

Searching i.e. for "vec -> vec" returns Vec::new as search result.

[quodlibetor]

Without the self type as the lhs of the U -> T there is no way to search for "all methods that produce T" (i.e. -> vec and similar don't work) perhaps something like * -> T and/or void -> T should be added before this is fixed?