Merge pull request #4189 from tronprotocol/release_v4.4.2

Release v4.4.2 to master

Author: forfreeday

actuator/src/main/java/org/tron/core/actuator/TransferActuator.java

@@ -150,8 +150,8 @@ public boolean validate() throws ContractValidateException {
               "Account type is Contract, but it is not exist in contract store.");
         } else if (contractCapsule.getContractVersion() == 1) {
           throw new ContractValidateException(
-              "Cannot transfer TRX to a smartContract which version is one. " +
-                  "Instead please use TriggerSmartContract ");
+              "Cannot transfer TRX to a smartContract which version is one. "
+                  + "Instead please use TriggerSmartContract ");
         }
       }