anchor.diff:  <body>
       <%# Stylesheets are placed in the <body> for Turbolinks compatibility. %>
       <style>
  +
       /* Basic reset */
       * {
           margin: 0;
  
positive.code: 
      pre, code, .repl input, .repl .prompt span, textarea, .code_linenums {
          font-family: menlo, lucida console, monospace;
          font-size: 8pt;
      }
  
      /* ---------------------------------------------------------------------
  
negative.code: 
          .frame_info {
              right: 0;
              left: 30%;
  
              padding: 20px;
              padding-left: 10px;
  