Rollup of 10 pull requests#25584

Closed

steveklabnik wants to merge 22 commits intorust-lang:masterfrom

steveklabnik:rollup

Commits on May 12, 2015

Update the bison grammar for various language changes
bleibig
committed

Commits on May 15, 2015

Make description of Borrow trait uses match the example.
jimblandy
committed

Commits on May 17, 2015

Commits on May 18, 2015