title: How to remove adornments like [exec] when using groovy's AntBuilder
body: <p>I'm using Groovy's AntBuilder to execute Ant tasks:</p>
  
  <pre><code>def ant = new AntBuilder()
  ant.sequential {
      ant.exec(executable: "cmd", dir: "..", resultproperty: "exec-ret-code") {
          arg(value: "/c")
          arg(line: "dir")
      }
  }
  </code></pre>
  
  <p>The output lines are prefixed by:</p>
  
  <p>[exec]</p>
  
  <p>Using Ant on the command line, this is turned off by "emacs mode"</p>
  
  <pre><code>ant -emacs ...
  </code></pre>
  
  <p>Is there a way to switch to emacs mode using AntBuilder?</p>