Too hard to find methods available on str

[Valloric]

I've been away from Rust code for a while, and here's how I went looking for methods on str:

1. Went to Rust homepage, clicked on beta API docs.
2. In the search bar, typed in str.
3. Clicked on first result, std::str.
4. Found no methods for str. Only structs are available, no stable traits that might have the methods.
5. Randomly clicked on Chars struct. Page says "Created with the method .chars()."
6. Typed chars into the search box. Lots of results, found a method core::str::StrExt::chars. Saw that StrExt was unstable, and I only want stable APIs so closed the tab.
7. Clicked around some more, gave up, asked on #rust IRC about str methods.
8. Was given link to Primitive type str.

Hopefully we'll have a better experience for the flood of newcomers at 1.0.

@steveklabnik

[emberian]

Closing as dupe of #23511

[emberian]

(Thanks for the great bug report, though)