multi: update linter, fix new issues

lnwallet/btcwallet/btcwallet.go

@@ -1688,7 +1688,6 @@ out:
 						}
 					}
 				}
-
 			}(txNtfn)
 
 			// Launch a goroutine to re-package and send

lnwallet/chanfunding/coin_select_test.go

@@ -874,7 +874,7 @@ func TestCoinSelectUpToAmount(t *testing.T) {
 				defaultChanFundingChangeType,
 			)
 			if len(test.expectErr) == 0 && err != nil {
-				t.Fatalf(err.Error())
+				t.Fatal(err.Error())
 			}
 			if changeAmt != test.expectedChange {
 				t.Fatalf("expected %v change amt, got %v",