Feature-gate `<>` syntax used with `Fn`. Fixes #18875.#20869

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bors merged 1 commit intorust-lang:masterfrom nikomatsakis:issue-18875

Jan 10, 2015

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Commits on Jan 10, 2015

Feature-gate <> syntax used with Fn. Fixes rust-lang#18875 .
nikomatsakis
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