change req from jay

draft-ymbk-grow-wkc-behavior.xml

@@ -133,7 +133,7 @@
     present on the update received from the neighbor, and apply this set
     of communities instead."</t>
 
-    <t>Some prefer to write explicit policy to delete unwanted
+    <t>Some operators prefer to write explicit policy to delete unwanted
     communities rather than using "set;" i.e. using a "delete community
     *:*" and then "add community x:y ..." configuration statements in an
     attempt to replace all received communities.  The same community