minor Rendermode change

Author: jmckenna

en/mapfile/layer.txt

@@ -52,7 +52,7 @@ BINDVALS
     Inside a layer, only a single class will be used for the rendering
     of a feature. Each feature is tested against each class in the order
     in which they are defined in the mapfile. The first class that matches
-    the its min/max scale constraints and its :ref:`EXPRESSION <expressions>`
+    its min/max scale constraints and its :ref:`EXPRESSION <expressions>`
     check for the current feature will be used for rendering.
 
     This can be controlled with