Change error message for better internationalization

gramps/plugins/importer/importvcard.py

@@ -223,7 +223,8 @@ class VCardParser:
         if problem != "":
             self.number_of_errors += 1
         if line:
-            message = _("Line") + " %5d: %s\n" % (line, problem, )
+            message = _("Line %(line)5d: %(prob)s\n") % {"line": line,
+                                                         "prob": problem}
         else:
             message = problem + "\n"
         self.errors.append(message)