title: Can a Java annotation spread over multiple lines?
body: <p>I use GWT I18N, which relies on annotations for messages with parameters.<br>
  Exemple :</p>
  
  <pre><code>@DefaultMessage("Here is a message &lt;br/&gt; with a param:{0}")
  String messageToLocalize(String param);
  </code></pre>
  
  <p>In absence of a localized translation, the default message will be used.<br>
  I have some quite long strings to handle, which I would like to type in sevral lines for code readability (I don't speak about multiple lines for the rendered message).  </p>
  
  <p>I tried this :  </p>
  
  <pre><code>@DefaultMessage("Here is a long \
  message &lt;br/&gt; with a \
  param:{0}")
  String messageToLocalize(String param);
  </code></pre>
  
  <p>It fails (GWT PlugIn 4.2 and SDK 2.5.1) with an error "Invalid Escape Sequence".  </p>
  
  <p>Did I miss something ?<br>
  Is it a constraint on Java annotations or GWT ? (I am afraid so but couldn't find anything on that)<br>
  Is there a workaround ?<br>
  Thanks</p>
  
  <hr>
  
  <p>Edit : Given first answers, the question must be rephrased : is it possible, and <strong>which character should I use to show continuation</strong> (if any) ?<br>
  The annotation processor obviously needs something to tell him.
  I tried "\" because it is the char to use in property file ...<br>
  "+" does not work either.</p>