google/traceur-compiler — pull request #291 by usrbincc (2013-05-07 18:48:28+00:00)
Title: Make sure `getopt` errors on invalid long options.

Before, `getopt` was returning invalid long options as arguments.

```sh
# Examples:
./traceur --not-a-filename.js --"has spaces" --= --? --^ --...
```