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