anchor.diff:        body {
           margin: 0;
           color: #333;
  +        font-family: "Noto Sans JP", sans-serif;
         }
   
         main {
  
positive.code:     <% else %>
        <link rel="canonical" href="/">
      <% end %>
      <meta name="viewport" content="width=device-width,minimum-scale=1,initial-scale=1">
      <style amp-boilerplate>body{-webkit-animation:-amp-start 8s steps(1,end) 0s 1 normal both;-moz-animation:-amp-start 8s steps(1,end) 0s 1 normal both;-ms-animation:-amp-start 8s steps(1,end) 0s 1 normal both;animation:-amp-start 8s steps(1,end) 0s 1 normal both}@-webkit-keyframes -amp-start{from{visibility:hidden}to{visibility:visible}}@-moz-keyframes -amp-start{from{visibility:hidden}to{visibility:visible}}@-ms-keyframes -amp-start{from{visibility:hidden}to{visibility:visible}}@-o-keyframes -amp-start{from{visibility:hidden}to{visibility:visible}}@keyframes -amp-start{from{visibility:hidden}to{visibility:visible}}</style><noscript><style amp-boilerplate>body{-webkit-animation:none;-moz-animation:none;-ms-animation:none;animation:none}</style></noscript>
      <script async custom-element="amp-social-share" src="https://cdn.ampproject.org/v0/amp-social-share-0.1.js"></script>
  
negative.code:         background-color: #f0f0f0;
          padding: 0.2em;
          border-radius: 4px;
          font-family: monospace;
        }
  
        pre > code {
  