paymentsdb: fix linter

diff --git a/payments/db/interface.go b/payments/db/interface.go
index d3a7e76..9b91de9 100644
--- a/payments/db/interface.go
+++ b/payments/db/interface.go
@@ -44,10 +44,10 @@ type PaymentWriter interface {
 // its database operations. This interface represents the control flow of how
 // a payment should be handled in the database. They are not just writing
 // operations but they inherently represent the flow of a payment. The methods
-// are called in the following order:
+// are called in the following order.
 //
-// 1. InitPayment
-// 2. RegisterAttempt (a payment can have multiple attempts)
+// 1. InitPayment.
+// 2. RegisterAttempt (a payment can have multiple attempts).
 // 3. SettleAttempt or FailAttempt (attempts can also fail as long as the
 // sending amount will be eventually settled).
 // 4. Payment succeeds or "Fail" is called.
diff --git a/payments/db/payment_test.go b/payments/db/payment_test.go
index fcd82af..c07d0e9 100644
--- a/payments/db/payment_test.go
+++ b/payments/db/payment_test.go
@@ -1387,7 +1387,10 @@ func TestSwitchFail(t *testing.T) {
 	require.NoError(t, err, "unable to fail payment hash")
 
 	// Verify the status is indeed Failed.
-	assertDBPaymentstatus(t, paymentDB, info.PaymentIdentifier, StatusFailed)
+	assertDBPaymentstatus(
+		t, paymentDB, info.PaymentIdentifier, StatusFailed,
+	)
+
 	assertPaymentInfo(
 		t, paymentDB, info.PaymentIdentifier, info, &failReason, nil,
 	)