This variant became unused in rust-lang#30884.

I followed the "Testing" chapter using Rust 1.12.1 but there are some differences. By default the `tests` module is now also generated by `cargo new`, and the console output is updated.

It's a bad practice as far [RFC 1241] is concerned, and introducing it
in early tutorial may as well make it feel legitimate.

[RFC 1241]: https://github.com/rust-lang/rfcs/blob/master/text/1241-no-wildcard-deps.md

… other examples and prevent incorrect indentation

…amples in the Closures section

str: Fix documentation typo

from_utf8 returns a Result, not an Option.

Signed-off-by: David Henningsson [email protected]

…r=alexcrichton

Remove TypeOrigin::RangeExpression

This variant became unused in rust-lang#30884.

…komatsakis

run rustfmt on librustc_driver folder

Fix a few links in the docs

r? @steveklabnik

Update "Testing" chapter for 1.12

I followed the "Testing" chapter using Rust 1.12.1 but there are some differences. By default the `tests` module is now also generated by `cargo new`, and the console output is updated.

Don't mention "*" dependency version in guessing game example

It's a bad practice as far [RFC 1241](https://github.com/rust-lang/rfcs/blob/master/text/1241-no-wildcard-deps.md) is concerned, and introducing it in early tutorial may as well make it feel legitimate.

Commented out final 'main' function in order to fit within pattern of…

… other examples and prevent incorrect indentation