Change rustc to say `array` instead of `vector`
core: Make TwoWaySearcher reset its prefix memory when shifting by byteset

Closes #16878.
Add many comments to TwoWaySearcher.
Add unnecessary_import_braces lint.

The lint checks any unnecessary braces around one imported item like
`use std::num::{abs};`.

Signed-off-by: OGINO Masanori <masanori.ogino@gmail.com>
json: Properly handle trailing comma error in object decoding.

Closes #16945
Don't use 'here'

Fixes #17225
properly annotate C code in the guide

Without 'notrust,' we were getting a playpen link.

Fixes #17228.
remove references to HM inference

Fixes #17229.
remove rendundant function

Fixes #17230.
use _sample configurations..._ rather than _here_ as link text
Add missing unused variable warnings for for loop bindings
add missing semicolon to fix configure on darwin
mk: Update how the build deals with version labels. #16677

Adds a new configure flag, --release-channel, which determines how the version
number should be augmented with a release label, as well as how the distribution
artifacts will be named. This is entirely for use by the build automation.

--release-channel can be either 'source', 'nightly', 'beta', or 'stable'.

Here's a summary of the affect of these values on version number and
artifact naming, respectively:

* source - '0.12.0-pre', 'rust-0.12.0-pre-...'
* nightly - '0.12.0-nightly', 'rust-nightly-...'
* beta - '0.12.0-beta', 'rust-beta-...'
* stable - '0.12.0', 'rust-0.12.0-...'

Per http://discuss.rust-lang.org/t/rfc-impending-changes-to-the-release-process/508/1
stop spawning so many tasks in guide-tasks

1000 tasks * 2MiB stack size -> 2GiB of virtual memory

On a 64-bit OS, a 32-bit executable has 4GiB available, but the kernel
gets half of the available address space so the limit is 2GiB on 32-bit.

Closes #17044
Correct windows install link in guide

This closes #17260. The guide references the old install location for
the windows rust install before it was split into 64bit and 32bit
installers. This adds a link to each binary.
Rename std::io::net::unix to std::io::net::pipe.

Renamed as we may support pipes for other platforms.

Closes #12093

[breaking-change]
Update triple per comments
Clean up code for unused_must_use lint
Generalize lifetime bounds on type parameters to support multiple
lifetime bounds. This doesn't really cause any difficulties, because
we already had to accommodate the fact that multiple implicit bounds
could accumulate. Object types still require precisely one lifetime
bound. This is a pre-step towards generalized where clauses (once you
have lifetime bounds in where clauses, it is harder to restrict them
to exactly one).
Deprecate libnum in favor of rust-lang/num

This is part of the migration of crates into the Cargo ecosystem. There
is now an external repository https://github.com/rust-lang/num for bignums.

The single use of libnum elsewhere in the repository is for a shootout
benchmark, which is being moved into the external crate.

Due to deprecation, this is a:

[breaking-change]