Address feedback

Author: davidkyle

x-pack/plugin/ml/src/main/java/org/elasticsearch/xpack/ml/action/TransportGetDatafeedsAction.java

@@ -80,7 +80,7 @@ protected void masterOperation(GetDatafeedsAction.Request request, ClusterState
                     }
 
                     // Merge cluster state and index configs
-                    List<DatafeedConfig> datafeeds = new ArrayList<>();
+                    List<DatafeedConfig> datafeeds = new ArrayList<>(datafeedBuilders.size() + clusterStateConfigs.values().size());
                     for (DatafeedConfig.Builder builder: datafeedBuilders) {
                         datafeeds.add(builder.build());
                     }

x-pack/plugin/ml/src/main/java/org/elasticsearch/xpack/ml/action/TransportPutDatafeedAction.java

@@ -152,7 +152,7 @@ private void putDatafeed(PutDatafeedAction.Request request, Map<String, String>
         };
 
         CheckedConsumer<Boolean, Exception> jobOk = ok ->
-            validateDatafeedAgainstJob(request.getDatafeed(), ActionListener.wrap(validationOk, listener::onFailure));;
+            validateDatafeedAgainstJob(request.getDatafeed(), ActionListener.wrap(validationOk, listener::onFailure));
 
         checkJobDoesNotHaveADatafeed(jobId, ActionListener.wrap(jobOk, listener::onFailure));
     }