rust-lang/rust — pull request #16448 by liigo (2014-08-12 12:31:28+00:00)
Title: rustdoc: add tooltips to sidebar

This PR add tooltip to most every links in sidebar, showing its primary description.

Online preview:
http://liigo.com/tmp/rust/std/index.html
http://liigo.com/tmp/rust/std/str/trait.StrSlice.html