Rollup of 15 pull requests#37670

Merged

bors merged 39 commits intorust-lang:masterfrom

Nov 9, 2016

Commits on Oct 25, 2016

rustdoc: mark unsafe fns with icons
liigo
committed

Commits on Oct 29, 2016

Add documentation to write! and writeln! on using both io::Write and fmt::Write
joshtriplett
committed

Commits on Nov 5, 2016

Include type of missing trait methods in error
estebank
committed

Commits on Nov 7, 2016

Rename KNOWN_ATTRS to BUILT_ATTRS, and create KNOWN_ATTRS
keeperofdakeys
committed

Commits on Nov 8, 2016

Commits on Nov 9, 2016