Doc for helper itarators of core::str inconsitent

[EdorianDark]

The documentation for RSplit (http://doc.rust-lang.org/core/str/struct.RSplit.html) is just

Return type of str::rsplit

The documentation for Lines (http://doc.rust-lang.org/core/str/struct.Lines.html) is

An iterator over the lines of a string, separated by \n.

The of Chars (http://doc.rust-lang.org/core/str/struct.Chars.html) is

Iterator for the char (representing Unicode Scalar Values) of a string
Created with the method .chars().

I think it would be nice if the iterators were describet more simmilar.
I like the dokumentation for Chars the best.