anchor.diff:    font-weight: bold
   
   .red.button, .red.button:visited
  -  background-color: #e62728
  +  background-color: var(--theme-button)
   .red.button:hover
     background-color: #cf2525
   
  
positive.code: 
  // link
  a
    color: $link-color
    font-style: normal
    text-decoration: underline
  
  a:link
    color: $link-color
    font-style: normal
    text-decoration: underline
  
  a:visited
    color: $link-visited-color
    text-decoration: underline
  
  a:hover
    color: $link-color
    font-style: normal
    text-decoration: underline
  
  
negative.code: .room-info
    background: linear-gradient(top, #fbfbfb 41%, #ededed 100%), #f9f9f9
    border-radius: 5px
    border: 1px solid var(--border-color)
    font-size: 100%
    padding: 5px
    margin-top: 15px
  