code: function(content) {
  			if (!reHasComment.test(content)) {
  				return content;
  			}
  
  			var stream = stringStream(content);
  			var replaceRanges = [];
  			var ch, ch2;
  
  			while ((ch = stream.next())) {
  				if (ch === '/') {
  					ch2 = stream.peek();
  					if (ch2 === '*') { // multiline CSS comment
  						stream.start = stream.pos - 1;
  
  						if (stream.skipTo('*/')) {
  							stream.pos += 2;
  						} else {
  							// unclosed comment
  							stream.skipToEnd();
  						}
  
  						replaceRanges.push([stream.start, stream.pos]);
  					} else if (ch2 === '/') {
  						// preprocessor’s single line comments
  						stream.start = stream.pos - 1;
  						while ((ch2 = stream.next())) {
  							if (ch2 === '\n' || ch2 == '\r') {
  								break
  							}
  						}
  
  						replaceRanges.push([stream.start, stream.pos]);
  					}
  				} else {
  					stream.skipQuoted();
  				}
  			}
  
  			return utils.replaceWith(content, replaceRanges, ' ');
  		}
docs: Replaces all comments in given CSS source with spaces,
  which allows more reliable (and faster) token search
  in CSS content
  @param  {String} content CSS content
  @return {String}