anchor.diff:    h3 Modifications applied to W3C HTML 5.1
     ul
       li Replace “’” with “'”
  -    li Replace “behavior” with “behaviours”
  -    li Replace “Color” with “Colour” “excepting type=color”
       li Replace “Plugin Content Handlers” with “Plugins”
  +    li Replace “Color” with “Colour” excepting “type=color”
  +    li Replace “A link or button containing nothing but an image” with “A link or button containing nothing but the image”
  +    li Replace “Images of text” with “Text that has been rendered to a graphic for typographical effect”
  +    li Replace “Synchronizing” with “Synchronising”
  +    li Replace “implementation notes” with “Implementation notes”
  +    li Replace “behaviors” with “behaviours”
       li Replace “Serializing” with “Serialising”
  -    li Replace “Synchronizing” with “Synchronising”
       li Reorder “Links” in “The elements of HTML”
  +    li Reorder “Calling scripts” in “Processing model”
   
     h2 Q. Are HTMLs displayed in this site same as the specifications?
     p No. This site reformats HTMLs to reduce unnecessary diffs.
  
positive.code:   p There are number of differences between WHATWG HTML Standard and W3C HTML 5.1. At the time of writing this, the differences include:
    ul
      li <code>hgroup</code>
      li <code>blockquote</code>
      li <code>main</code>
      li <code>a[ping]</code>
      li <code>ruby</code>
      li <code>cite</code>
      li <code>iframe[seamless]</code>
      li <code>xml:base</code>
      li Table sorting model
      li <code>input[type="datetime-local"]</code> and <code>input[type="datetime"]</code>
      li Canvas 2D Context
      li Microdata
      li <code>requestAnimationFrame</code>
      li Sever-sent events
      li <code>postMessage</code> and <code>onmessage</code>
      li Web Sockets API
      li Web Workers
      li Web Storage
      li requirements for alternative texts of images
      li <code>showModalDialog</code>
    p I can’t remember the differences. Thus I created this site.
    
  
negative.code:   h3 Modifications applied to both WAHTWG HTML Standard and W3C HTML 5.1
    ul
      li Normalize white spaces
      li Remove start and end tags of <code>a</code>, <code>em</code>, <code>strong</code>, <code>dfn</code>, <code>code</code>, <code>var</code>, and <code>i</code>.
      li Sort attributes alphabetically
      li Remove <code>data-*</code> attributes
      li Remove <code>id</code> attribute
  