Use the same coding style in toString() implementations

Change-Id: I116eb140d92b385d36efe120c42cd2fb3efac760
diff --git a/pcep/pcepio/src/main/java/org/onosproject/pcepio/types/PcepNaiIpv6NodeId.java b/pcep/pcepio/src/main/java/org/onosproject/pcepio/types/PcepNaiIpv6NodeId.java
index 9d4be45..3b7d52f 100644
--- a/pcep/pcepio/src/main/java/org/onosproject/pcepio/types/PcepNaiIpv6NodeId.java
+++ b/pcep/pcepio/src/main/java/org/onosproject/pcepio/types/PcepNaiIpv6NodeId.java
@@ -95,6 +95,8 @@
 
     @Override
     public String toString() {
-        return MoreObjects.toStringHelper(getClass()).add("IPV6NodeID", ipv6NodeId).toString();
+        return MoreObjects.toStringHelper(getClass())
+                .add("IPV6NodeID", ipv6NodeId)
+                .toString();
     }
 }