book: Explain better why the filter closure gets a reference#31870
Merged
bors merged 1 commit intorust-lang:masterfrom Feb 25, 2016
ivan:filter-explain
Merged
book: Explain better why the filter closure gets a reference#31870bors merged 1 commit intorust-lang:masterfrom ivan:filter-explain
bors merged 1 commit intorust-lang:masterfrom
ivan:filter-explain
