Fix an extra space in the <pre>

manual/using.html

@@ -172,7 +172,7 @@ task instances at all, only proxies.
   <!-- set global properties for this build -->
   <property name="src" location="src"/>
   <property name="build" location="build"/>
-  <property name="dist"  location="dist"/>
+  <property name="dist" location="dist"/>
 
   <target name="init">
     <!-- Create the time stamp -->