o/~ Y muchos maaaaaaas... o/~

tools/dom/src/CssClassSet.dart

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 part of html;
 
 /** A Set that stores the CSS class names for an element. */
 abstract class CssClassSet implements Set<String> {
 
   /**
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    * [hasClass](http://api.jquery.com/hasClass/).
    */
   bool contains(String value);
 
   /**
    * Add the class [value] to element.
    *
    * This is the Dart equivalent of jQuery's
    * [addClass](http://api.jquery.com/addClass/).
    *
-   * If this corresponds to one element. Returns `true` if [value] was added to
-   * the set, otherwise `false`.
+   * If this corresponds to one element. Returns true if [value] was added to
+   * the set, otherwise false.
    *
-   * If this corresponds to many elements, `null` is always returned.
+   * If this corresponds to many elements, null is always returned.
    */
   bool add(String value);
 
   /**
    * Remove the class [value] from element, and return true on successful
    * removal.
    *
    * This is the Dart equivalent of jQuery's
    * [removeClass](http://api.jquery.com/removeClass/).
    */
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       }
     }
     return s;
   }
 
   void writeClasses(Set<String> s) {
     List list = new List.from(s);
     _element.className = s.join(' ');
   }
 }