diff --git a/core/state_transition.go b/core/state_transition.go
index 71cc2b885b..32b735e55f 100644
--- a/core/state_transition.go
+++ b/core/state_transition.go
@@ -447,7 +447,7 @@ func (st *StateTransition) TransitionDb() (*ExecutionResult, error) {
 		UsedGas:    st.gasUsed(),
 		Err:        vmerr,
 		ReturnData: ret,
-		GasRefund:	gasRefund,
+		GasRefund:  gasRefund,
 	}, nil
 }
 
diff --git a/internal/ethapi/api.go b/internal/ethapi/api.go
index cba6559c14..2dfc4dd511 100644
--- a/internal/ethapi/api.go
+++ b/internal/ethapi/api.go
@@ -1280,7 +1280,7 @@ func DoEstimateGas(ctx context.Context, b Backend, args TransactionArgs, blockNr
 		return 0, fmt.Errorf("gas required exceeds allowance (%d)", hi)
 	}
 
-	// Optimization: if the transaction succeeded with gasLimit set to the first execution's 
+	// Optimization: if the transaction succeeded with gasLimit set to the first execution's
 	// usedGas + gasRefund, then return that value immediately. Else, continue with the binary search.
 	optimisticGasLimit := result.UsedGas + result.GasRefund
 	failed, _, err = executeEstimate(ctx, b, args, state.Copy(), header, gasCap, optimisticGasLimit)