Provide a note if method lookup fails and there are static definitions with the same name.
emacs: Add 'box' to keywords
Replace most ~exprs with 'box'. #11779
auto merge of #13773 : brson/rust/boxxy, r=alexcrichton

`box` is the way you allocate in future-rust.
auto merge of #13685 : Ryman/rust/issue7575, r=alexcrichton

Closes #7575.

I don't think the change from a contains lookup to an iteration of the HashSet in the resolver should be much of a burden as the set of methods with the same name should be relatively small.