Fix style checks

src/main/java/org/torproject/metrics/collector/relaydescs/RelayDescriptorDownloader.java

@@ -813,7 +813,7 @@ public class RelayDescriptorDownloader {
             if (authorityIndex != -1) {
               String authority = this.authoritiesStatic.get(authorityIndex);
 
-              if(!descriptorIdentifiers.containsKey(authority)) {
+              if (!descriptorIdentifiers.containsKey(authority)) {
                 descriptorIdentifiers.put(authority, new ArrayList<String>());
               }
               descriptorIdentifiers.get(authority).add(descriptorIdentifier);