rustc: Remove f{32,64} % from the language

This commit removes the compiler support for floating point modulus operations,
as well as from the language. An implementation for this operator is now
required to be provided by libraries.

Floating point modulus is rarely used, doesn't exist in C, and is always lowered
to an fmod library call by LLVM, and LLVM is considering removing support
entirely.

Closes #12278
Append missing padding after last field of struct

This patch fixes issue #13186.

When generating constant expression for enum, it is possible that
alignment of expression may be not equal to alignment of type.  In that
case space after last struct field must be padded to match size of value
and size of struct. This commit adds that padding.

See detailed explanation in src/test/run-pass/trans-tag-static-padding.rs
Tweaked the design to be a lot cleaner.

Signed-off-by: Daniel Fagnan <dnfagnan@gmail.com>
fixed issues

Signed-off-by: Daniel Fagnan <dnfagnan@gmail.com>
doc: design changes cleanups

Conflicts:
	src/librustdoc/html/layout.rs
rustdoc: add webfonts and tweak the styles accordingly
std: Update documentation on the `comm` module

Some of this documentation got a little out of date. There was no mention of a
`SyncSender`, and the entire "Outside the runtime" section isn't really true any
more (or really all that relevant).

This also updates a few other doc blocks and adds some examples.
Register new snapshots
Move `--ls` behind `-Z ls`

Closes #13549
Combine lifetime parameters when instantiating default methods

When instantiating trait default methods for certain implementation,
`typeck` correctly combined type parameters from trait bound with those
from method bound, but didn't do so for lifetime parameters. Applies
the same logic to lifetime parameters.

Closes #13204
doc: Removed all definition lists as Sundown doesn't support them.

Closes #13561. Please revert this commit when Sundown (or any
replacement) gets a support for definition lists in the future.
man: Add missing options to rustc.1
rustc: Slightly reword the --no-analysis description for clarity
std: Improve docs for mod 'result'
doc: Address review feedback
rustc: Don't allocate a cnum to syntax crates

Syntax-only crates are no longer registered with the cstore, so there's no need
to allocate crate numbers to them. This ends up leaving gaps in the crate
numbering scheme which is not expected in the rest of the compiler.

Closes #13560
This is a Windows specific fix in libc. According to MSDN, the GUID
structure's Data2 and Data3 members expect WORD types instead of DWORD. I
discovered this discrepancy while experimenting with some bindings to
Microsoft's OLE2 api. The discrepancy was corrupting the contents of the
string returned by UuidToString after I used known GUIDs to test the
accuracy of the function binding. I didn't add test cases because it would
mean adding a dependency to my rather incomplete binding library. However,
the fix produces expected string values when tested.
auto merge of #13465 : alexcrichton/rust/fix-comm-dox, r=brson

Some of this documentation got a little out of date. There was no mention of a
`SyncSender`, and the entire "Outside the runtime" section isn't really true any
more (or really all that relevant).

This also updates a few other doc blocks and adds some examples.
rustc: Fix omission of bytecode in staticlibs

The name of the file changed awhile back and this spot wasn't updated to
continue ignoring the bytecode from rlibs when copying into staticlibs.
auto merge of #13485 : adrientetar/rust/newrustdoc, r=brson

- Cherry-pick from #12996
- Use Fira Sans for headlines and sidebar (Light), Heuristica for the body (Adobe Utopia derivative). Both are licensed under the SIL OFL license.
- A few tweaks

Two examples: [modified `std`](http://adrientetar.legtux.org/cached/rust-docs/std.htm) and [modified `std::io`](http://adrientetar.legtux.org/cached/rust-docs/io.htm).

cc #13484
**Blocked on graydon/rust-www#25 (for hosting of the fonts), that's showcased [here](http://adrientetar.github.io/rust-www/).**

cc @brson, @TheHydroImpulse