anchor.diff:     * [namespace] URI is provided, the prefix is looked up, verified and
      * combined with the given attribute [name].
      *
  -   * To generate _&lt;message lang="en" />_ one would write:
  -   *
  -   *     builder.element('node', nest: () {
  +   * To generate an element with the tag _message_ and the attribute _lang="en"_
  +   * one would write:
  +   *
  +   *     builder.element('message', nest: () {
      *        builder.attribute('lang', 'en');
      *     });
      *
  
positive.code:   /**
     * Adds a [XmlProcessing] node with the provided [target] and [text].
     *
     * For example, to generate _&lt;?xml version="1.0"?>_ one would write:
     *
     *     builder.processing('xml', 'version="1.0"');
     *
  
negative.code:   /**
     * Adds a [XmlText] node with the provided [text].
     *
     * For example, to generate the text _Hello World_ one would write:
     *
     *     builder.text('Hello World');
     *
  