White space formatting fixes

Closes: <https://github.com/nginx/unit/pull/1062>

src/java/nginx/unit/websocket/Util.java

@@ -332,7 +332,7 @@ public class Util {
 
     public static List<DecoderEntry> getDecoders(
             List<Class<? extends Decoder>> decoderClazzes)
-                    throws DeploymentException{
+                    throws DeploymentException {
 
         List<DecoderEntry> result = new ArrayList<>();
         if (decoderClazzes != null) {

src/java/nginx/unit/websocket/server/WsSessionListener.java

@@ -19,7 +19,7 @@ package nginx.unit.websocket.server;
 import javax.servlet.http.HttpSessionEvent;
 import javax.servlet.http.HttpSessionListener;
 
-public class WsSessionListener implements HttpSessionListener{
+public class WsSessionListener implements HttpSessionListener {
 
     private final WsServerContainer wsServerContainer;