gruntjs/grunt-contrib-uglify — pull request #44 by acdha (2013-03-25 18:58:50+00:00)
Title: Generate safe sourcemaps

The previous comment syntax was unsafe with Internet Explorer. This change
copies the equivalent upstream change to use the more robust nested comment:

```javascript
/*
//@ sourceMappingURL=file.min.js.map
*/
```

See:
https://github.com/mishoo/UglifyJS2/issues/108
http://bugs.jquery.com/ticket/13274