[#6920] some tweaks after review

Author: xabbuh

bundles/prepend_extension.rst

@@ -132,7 +132,9 @@ The above would be the equivalent of writing the following into the
             'use_acme_goodbye' => false,
         ));
 
-More than one bundle using PrependExtensionInterface
+More than one Bundle using PrependExtensionInterface
 ----------------------------------------------------
 
-When there is more than one bundle prepending the same extension and defining the same key, the bundle that is registered **first** will take priority and next bundles won't override this specific config setting.  
+If there is more than one bundle that prepends the same extension and defines
+the same key, the bundle that is registered **first** will take priority:
+next bundles won't override this specific config setting.