[Lewisham]

Specific thought: Trait implementation pages like http://static.rust-lang.org/doc/master/std/collections/hash_... should output the first paragraph of the documentation text. That way you can easily scan/Ctrl+F through the documentation that's right next to the struct you're interested in. Reduce the number of clicks and context switches.

It's just a pretty terrifying way to output right now.

[steveklabnik]

Ah, just saw your edit. So, to be clear about what you mean, you want the Iterator implementation to show the summary line on this page? Seems reasonable to me! I filed a bug: https://github.com/rust-lang/rust/issues/33672

(Also, that page is a bit sparse because I haven't gotten around to writing any docs for it yet, so it's just the autogenerated stuff.)

[Lewisham]

Yeah, once you actually get to the text, it's really good and clearly improved from 12 months ago when I last got the free time to play around significantly.

Thanks for the bug ticket :)

[Manishearth]

Made a PR: https://github.com/rust-lang/rust/pull/33679