mesh operator documentation patch from Ron walker, (edited a few of the descriptions)

source/blender/editors/mesh/editmesh_loop.c

@@ -717,6 +717,7 @@ void MESH_OT_knife_cut(wmOperatorType *ot)
 	PropertyRNA *prop;
 	
 	ot->name= "Knife Cut";
+	ot->description= "Cut selected edges and faces into parts.";
 	ot->idname= "MESH_OT_knife_cut";
 	
 	ot->invoke= WM_gesture_lines_invoke;