lesscpy/lesscpy — pull request #57 by caioariede (2014-11-05 23:02:48+00:00)
Title:  Syntax Error, token: `css_filter`, `and (@b = @a)`

The following valid less code is not working as expected:

```less
.eq (@a, @b) when (@a < @b) and (@b = @a) {
}
```

This is the error output:

Syntax Error, token: `css_filter`, `and (@b = @a)`