elbank-report now display empty string when transaction has no label

elbank-report.el

@@ -459,7 +459,7 @@ Signal an error if there is no transaction at point."
   "Return a button text with the label of TRANSACTION.
 When clicking the button, jump to the transaction."
   (with-temp-buffer
-    (insert (elbank-transaction-elt transaction 'label))
+    (insert (elbank-transaction-elt transaction 'label ""))
     (make-text-button (point-at-bol) (point)
 		      'follow-link t
 		      'action

test/elbank-report-test.el

@@ -68,6 +68,9 @@
               :to-have-been-called-with '(("cat1" . "2000")
                                           ("foo" . "1500")
                                           ("bar" . "500")) main-transaction))))
+(describe "Representing transaction"
+  (it "with a nil label"
+    (expect (elbank-report--cell '((label)) 'label) :to-equal "")))
 
 (provide 'elbank-report-test)
 ;;; elbank-report-test.el ends here