Rollup of 5 pull requests#39907

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GuillaumeGomez wants to merge 16 commits intorust-lang:masterfrom

GuillaumeGomez:rollup

Commits on Feb 15, 2017

Correct a typo in procedural macros chapter of the Book.
CBenoit
authored
cleanup: remove the *san Cargo features from std
Jorge Aparicio
committed
Fix wording in LocalKey documentation
Stjepan Glavina
committed

Commits on Feb 17, 2017