anchor.diff:        li
           h3 No image-set support
           h4=notSupportedImgSet
  -        img(src="/" + imgDir + "/" + notSupportedImgSet)
  +        img(src="./" + imgDir + "/" + notSupportedImgSet)
   
         each func, vendor in vendors
           li
  
positive.code:           each scale in scales
              - image = vendor+'@'+scale+'x.png';
              h4= image
              img(src="/" + imgDir + "/" + image, alt=image)
  
  
negative.code:         width: #{originalWidth}px;
          height: #{originalHeight}px;
          /* fallback */
          background-image: url(./#{imgDir}/#{notSupportedImgSet});
          /* test */
          #{cssString}
        }
  