Reformat and fix dependencies

aleksis/apps/tezor/models/invoice.py

@@ -10,7 +10,9 @@ from .base import Client
 
 class InvoiceGroup(ExtensibleModel):
     name = models.CharField(verbose_name=_("Invoice group name"), max_length=255)
-    client = models.ForeignKey(Client, verbose_name=_("Linked client"), related_name="invoice_groups")
+    client = models.ForeignKey(
+        Client, verbose_name=_("Linked client"), related_name="invoice_groups"
+    )
 
     class Meta:
         constraints = [
@@ -19,7 +21,9 @@ class InvoiceGroup(ExtensibleModel):
 
 
 class Invoice(ExtensibleModel):
-    group = models.ForeignKey(InvoiceGroup, verbose_name=_("Invoice group"), related_name="invoices")
+    group = models.ForeignKey(
+        InvoiceGroup, verbose_name=_("Invoice group"), related_name="invoices"
+    )
 
     number = models.CharField(verbose_name=_("Invoice number"))
     date = models.DateField(verbose_name=_("Invoice date"))