Clarify antcall in presence of self-modifying build files.

git-svn-id: https://svn.apache.org/repos/asf/ant/core/trunk@275182 13f79535-47bb-0310-9956-ffa450edef68

docs/manual/CoreTasks/antcall.html

@@ -39,6 +39,11 @@ the target "doSomethingElse" depended on the target "init",
 Of course, any properties defined in the antcall task or inherited from the calling target 
 will be fixed and not overridable in the init task -or indeed in the "doSomethingElse" task.  
 </p>
+
+<p>This task reparses the current build file, so if it has changed
+since you've started the project, <code>antcall</code> will use the
+latest version of the file.</p>
+
 <h3>Parameters</h3>
 <table border="1" cellpadding="2" cellspacing="0">
   <tr>