Empty string when calling NSEvent::characters on a event created by a Quote press

[bors-servo]

Issue by dawsonfi
Thursday Sep 07, 2017 at 02:23 GMT
Originally opened as servo/cocoa-rs#168

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When i press the Quote key, the NSEvent created returns empty string whe calling the characters function.

I'm using:
OS: MacOS Sierra
Keyboard: U.S. International - PC keyboard layout
Rust: from rustup -> rustc 1.19.0 (0ade33941 2017-07-17)