opal/opal — pull request #471 by jibi (2013-12-28 12:31:03+00:00)
Title: Use "//#" instead of "//@" deprecated syntax for sourceMappingURL

Firefox keeps filling the JS console with:
```
SyntaxError: Using //@ to indicate source map URL pragmas is deprecated. Use //# instead
```
this fix the problem (not tested with other browser).