Rustdoc search of the week

[lolbinarycat]

rustdoc search has a quite handy advanced search syntax, however a lot of people don't know how powerful it is.

I propose a "search (tip) of the week" section right after the crate of the week. examples would be stuff like structfield:start, demonstrating searching by the name of individual struct fields.

I would write these in bulk and they would be used up one by one in new issues. eventually they would either be recommended by the community, or the section would be discontinued once enough people were made aware of rustdoc search.