action tag and sitemesh issue
-----------------------------

                 Key: WW-2662
                 URL: https://issues.apache.org/struts/browse/WW-2662
             Project: Struts 2
          Issue Type: Bug
          Components: Core Actions
    Affects Versions: 2.1.2
         Environment: Mac OS X 10.5.2
            Reporter: James Humphrey


When using the action taglib in a jsp decorated by sitemesh, the results of the 
action are not embedding correctly.

**example.jsp**
<%@ taglib prefix="s" uri="/struts-tags" %>
<html>
<head>
  <title>Example</title>
</head>
<body>
  <p>Content Before action result</p>
  <s:action namespace="/foo" name="bar" executeResult="true"/> <!-- defining 
'flush="true"' also does not work -->
  <p>Content after action result</p>
</body>
</html>

*Bar action*
package action.foo;

/**
 * Example action.
 */
public class Bar extends ActionSupport {
    @Override
    public String execute() throws Exception {
        // stub for example purposes
    }
}

**bar.jsp result**
<p>foobar</p>

**decorators.xml**
<decorators defaultdir="/WEB-INF/decorators">
  <!--
    main decorator
  -->
  <decorator name="main" page="main.jsp">
    <pattern>/*</pattern>
  </decorator>
</decorators>

**main.jsp decorator***
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" 
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd";>
<%@ taglib prefix="sm" uri="http://www.opensymphony.com/sitemesh/decorator"; %>

<html xmlns="http://www.w3.org/1999/xhtml";>
<head>
  <title>
    <sm:title/>
  </title>
  <meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
  <sm:head/>
</head>
<body>
  <sm:body/>
</body>
</html>

Expected output:
...
<body>
  <p>Content Before action result</p>
  <p>foobar</p>
  <p>Content after action result</p>
</body>
...

Actual output:
<p>foobar</p>

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