anchor.diff:    @include box-shadow(0 2px 4px rgba(0,0,0,0.25));
     @include shadow-black(0.25);
     h1, h2, h3, h4, h5, h6 {
  -    font-weight: 600; 
  +    font-weight: 600;
     }
   }
   header.red {
  
positive.code: 
  // constrain the width of the issues google form
  .issues iframe {
    margin: auto; 
    display: block;
    max-width: 500px;
    width: 100%;
  
negative.code:   .input-append {
      position: relative;
      height: 45px;
      input, button {
        display: inline !important;
        float: none !important;
      }
    }
  