anchor.diff:  [source,scss]
   ....
   .my-button {
  -    color: red;
  +  color: red;
   }
   ....
   
  
positive.code: [source,scss]
  ....
  .important .v-button-caption {
      color: red;
  }
  ....
  
  
negative.code: @import "../reindeer/reindeer.scss";
  
  @mixin sassy {
    @include reindeer;
  
    .v-button-caption {
      color: red;
    }
  
    .important .v-button-caption {
      color:  green;
    }
  
    @include base-button($name: my-button);
    .my-button {
      color: blue;
    }
  }
  ....
  