Use printf in template

http/ynab-import.go

@@ -116,7 +116,7 @@ func trimLastChar(s string) string {
 }
 
 func GetAmount(inflow string, outflow string) (pgtype.Numeric, error) {
-	// Remove currency
+	// Remove trailing currency
 	inflow = strings.Replace(trimLastChar(inflow), ",", ".", 1)
 	outflow = strings.Replace(trimLastChar(outflow), ",", ".", 1)
 
@@ -126,6 +126,7 @@ func GetAmount(inflow string, outflow string) (pgtype.Numeric, error) {
 		return num, fmt.Errorf("Could not parse inflow %s: %w", inflow, err)
 	}
 
+	// if inflow is zero, use outflow
 	if num.Int.Int64() != 0 {
 		return num, nil
 	}