JeffreyWay/Compress-and-Concatenate-Stylesheets-with-PHP — pull request #3 by ala747 (2012-11-01 12:03:46+00:00)
Title: Improved regex to match empty rules also

Hi!

I've added a piece to the regex that match empty rules for deletion. It works well with
multiple-elements-in-muli-line and @media stuff with or without spaces and/or tabs between brackets.

Some examples (they are not all of them):
```css
/* with a tab inside */
element, .class, #id .child {

}

/* with spaces inside */
element, .class, #id .child {

}

/* multiple elements in multi line style */
element,
.class,
#id child {

}
/* all in one line with nothing inside */
element, .class, #id .child {}

/* an empty media query */
@media all and (min-width: 640px) {

}

/* etc. */
```

I hope it will help improve the compression part :)