Allow mutable slices in statics.

Fixes #11411
rustc: Move mut slice check to `check_static`

This is a follow-up patch that moves the mut slice check to the recently
added `check_static`

Closes #11411
doc: don't refer to 'char' as characters

This seems to be causing some confusion among users. Rust's char are
not 8bit characters, but 32bit UCS-4 codepoint without surrogates
(Unicode Scalar Values as per Unicode glossary).
Make the doc more explicit about it.

Signed-off-by: Luca Bruno <lucab@debian.org>
doc: uniform std::char doc-strings

Uniform and beautify doc-string for current rustdoc output.

Signed-off-by: Luca Bruno <lucab@debian.org>
doc: add two missing char methods doc-strings

XID_* property are defined in UAX #31, just reference it here.

Signed-off-by: Luca Bruno <lucab@debian.org>
libstd: Add some more functionality to Vec<T>
Removed DeepClone. Issue #12698.
librustc: Automatically change uses of `~[T]` to `Vec<T>` in rustc.
librustc: Fix up fallout from the automatic conversion.
librustdoc: Fix librustdoc for the `Vec<T>` change.
Incorporated review feedback atop pcwalton's original patches.

(Original PR was #12716; feedback was provided by thestinger and me.)
auto merge of #12768 : pnkfelix/rust/fsk-devecing, r=pnkfelix

Change `~[T]` to Vec<T> in librustc.  Rebased and amended version of PR #12716.

Original author (or perhaps I should say meta-author) was @pcwalton, as is reflected in the commits.

I clean up!  :)
auto merge of #12759 : lucab/rust/char-doc, r=alexcrichton

This is mostly a reaction to #12730. If we are going to keep calling them `char`, at least make it clear that they aren't characters but codepoint/scalar.
Refactored get_metadata_section to return a Result<T,~str>, added error messages. Closes #6615.
auto merge of #12706 : pongad/rust/issue_12698, r=brson

Fixes #12698
Add an option to not run rustdoc blocks

This is useful for code that would be expensive to run or has some kind
of external dependency (e.g. a database or server).
auto merge of #12758 : rgawdzik/rust/master, r=alexcrichton

Refactored get_metadata_section to return a Result<MetadataBlob,~str> instead of a Option<MetadataBlob>. This provides more clarity to the user through the debug output when using --ls.

This is kind of a continuation of my original closed pull request 2 months ago (#11544), but I think the time-span constitutes a new pull request.
auto merge of #12777 : sfackler/rust/no_run, r=alexcrichton

This is useful for code that would be expensive to run or has some kind
of external dependency (e.g. a database or server).
rustdoc: run on plain Markdown files.

This theoretically gives rustdoc the ability to render our guides,
tutorial and manual (not in practice, since the files themselves need to
be adjusted slightly to use Sundown-compatible functionality).

Fixes #11392.
rustdoc: add table-of-contents recording & rendering, use it with plain
markdown files.

This means that

    # Foo
    ## Bar
    # Baz
    ### Qux
    ## Quz

Gets a TOC like

    1 Foo
       1.1 Bar
    2 Baz
       2.0.1 Qux
       2.1 Quz

This functionality is only used when rendering a single markdown file,
never on an individual module, although it could very feasibly be
extended to allow modules to opt-in to a table of contents (std::fmt
comes to mind).