Use hard line breaks in all default email texts

src/pretix/control/forms/orders.py

@@ -895,7 +895,7 @@ class EventCancelForm(forms.Form):
                 'Hello,\n\n'
                 'with this email, we regret to inform you that {event} has been canceled.\n\n'
                 'We will refund you {refund_amount} to your original payment method.\n\n'
-                'You can view the current state of your order here:\n\n{url}\n\nBest regards,\n\n'
+                'You can view the current state of your order here:\n\n{url}\n\nBest regards,  \n\n'
                 'Your {event} team'
             ))
         )
@@ -922,7 +922,7 @@ class EventCancelForm(forms.Form):
                 'Hello,\n\n'
                 'with this email, we regret to inform you that {event} has been canceled.\n\n'
                 'You will therefore not receive a ticket from the waiting list.\n\n'
-                'Best regards,\n\n'
+                'Best regards,  \n\n'
                 'Your {event} team'
             ))
         )

src/pretix/control/forms/vouchers.py

@@ -271,7 +271,7 @@ class VoucherBulkForm(VoucherForm):
         required=False,
         initial=_('Hello,\n\n'
                   'with this email, we\'re sending you one or more vouchers for {event}:\n\n{voucher_list}\n\n'
-                  'You can redeem them here in our ticket shop:\n\n{url}\n\nBest regards,\n\n'
+                  'You can redeem them here in our ticket shop:\n\n{url}\n\nBest regards,  \n'
                   'Your {event} team')
     )
     send_recipients = forms.CharField(

src/pretix/control/templates/pretixcontrol/email/email_setup.txt

@@ -8,7 +8,7 @@ If that was you, please enter the following confirmation code:
 
 If this was not requested by you, you can safely ignore this email.
 
-Best regards,
+Best regards,  
 
 Your {{ instance }} team
 {% endblocktrans %}

src/pretix/control/templates/pretixcontrol/email/forgot.txt

@@ -4,6 +4,6 @@ you requested a new password. Please go to the following page to reset your pass
 
 {{ url }}
 
-Best regards,
+Best regards,  
 Your pretix team
 {% endblocktrans %}

src/pretix/control/templates/pretixcontrol/email/invitation.txt

@@ -11,7 +11,7 @@ If you want to join that team, just click on the following link:
 
 If you do not want to join, you can safely ignore or delete this email.
 
-Best regards,
+Best regards,  
 
 Your pretix team
 {% endblocktrans %}

src/pretix/control/templates/pretixcontrol/email/security_notice.txt

@@ -11,6 +11,6 @@ You can review and change your account settings here:
 
 {{ url }}
 
-Best regards,
+Best regards,  
 Your pretix team
 {% endblocktrans %}