Stripe: Unidecode Statement Descriptor; unify allowed characters and …

…symbols (#3825)

* Stripe: Unidecode Statement Descriptor; unify allowed characters and symbols

* Reverse str/unidecode order

src/pretix/plugins/stripe/payment.py

@@ -55,6 +55,7 @@
 from django.utils.timezone import now
 from django.utils.translation import gettext, gettext_lazy as _, pgettext
 from django_countries import countries
+from text_unidecode import unidecode
 
 from pretix import __version__
 from pretix.base.decimal import round_decimal
@@ -556,15 +557,15 @@ def statement_descriptor(self, payment, length=22):
             # the postfix.
             return '{code} {postfix}'.format(
                 code=payment.order.code,
-                postfix=re.sub('[^a-zA-Z0-9 ]', '', str(self.settings.postfix)),
+                postfix=re.sub("[^a-zA-Z0-9-_. ]", "", unidecode(str(self.settings.postfix))),
             )[:length]
         else:
             # If no custom postfix is set, we transmit the event slug and event name for backwards compatibility
             # with older pretix versions.
             return '{event}-{code} {eventname}'.format(
                 event=self.event.slug.upper(),
                 code=payment.order.code,
-                eventname=re.sub('[^a-zA-Z0-9 ]', '', str(self.event.name))
+                eventname=re.sub("[^a-zA-Z0-9-_. ]", "", unidecode(str(self.event.name))),
             )[:length]
 
     @property