change to markdown placeholder

pretix_digital_items/signals.py

@@ -6,15 +6,11 @@ from django.utils.translation import gettext_lazy as _
 from pretix.base.models import Order
 from pretix.base.signals import register_mail_placeholders, register_ticket_outputs
 from pretix.base.email import SimpleFunctionalMailTextPlaceholder
+from pretix.base.services.placeholders import MarkdownTextPlaceholder
 from pretix.control.signals import nav_event_settings
 from pretix.presale.signals import order_info_top
 from django.template.loader import get_template
 
-from pretix.base.signals import register_mail_placeholders, register_ticket_outputs
-from pretix.base.email import SimpleFunctionalMailTextPlaceholder
-from pretix.control.signals import nav_event_settings
-
-
 @receiver(
     register_mail_placeholders, dispatch_uid="pretix_digital_items_mail_placeholder"
 )
@@ -22,7 +18,7 @@ def register_mail_secrets(sender, **kwargs):
     token_mail_format = "{name}: {secret}"
     if sender.settings.digitalitems_token_mail_format:
         token_mail_format = sender.settings.digitalitems_token_mail_format
-    return SimpleFunctionalMailTextPlaceholder(
+    return MarkdownTextPlaceholder(
         "secrets",
         ["order"],
         lambda order: "\n"