3 files changed, 30 insertions, 25 deletions
diff --git a/accounts/backend/mail/__init__.py b/accounts/backend/mail/__init__.py
index f2ec5d5..bb1709f 100644
--- a/accounts/backend/mail/__init__.py
+++ b/accounts/backend/mail/__init__.py
@@ -5,7 +5,7 @@ from jinja2 import Template
 from jinja2.environment import TemplateModule
 
 
-class Backend():
+class Backend:
     app: Flask
 
     def __init__(self, app: Flask) -> None:
@@ -18,10 +18,9 @@ class Backend():
         if recipient is None:
             return
 
-        tmpl: Template = \
-            self.app.jinja_env.get_or_select_template(template)
+        tmpl: Template = self.app.jinja_env.get_or_select_template(template)
 
-        kwargs['recipient'] = recipient
+        kwargs["recipient"] = recipient
         module = tmpl.make_module(kwargs)
 
         self._send(recipient, module)
diff --git a/accounts/backend/mail/dummy.py b/accounts/backend/mail/dummy.py
index 049df7a..0c6da21 100644
--- a/accounts/backend/mail/dummy.py
+++ b/accounts/backend/mail/dummy.py
@@ -6,28 +6,29 @@ from accounts import AccountsFlask
 from jinja2.environment import TemplateModule
 
 
-FANCY_FORMAT = '''\
+FANCY_FORMAT = """\
 ,---------------------------------------------------------------------------
 | Subject: {subject}
 | To: {to}
 | From: {sender}
 |---------------------------------------------------------------------------
 | {body}
-`---------------------------------------------------------------------------'''
+`---------------------------------------------------------------------------"""
 
 
-PLAIN_FORMAT = '''Subject: {subject}
+PLAIN_FORMAT = """Subject: {subject}
 To: {to}
 From: {sender}
 
-{body}'''
+{body}"""
 
 
 class DummyBackend(Backend):
     format: str
 
-    def __init__(self, app: AccountsFlask, plain: bool = False,
-                 format: None = None) -> None:
+    def __init__(
+        self, app: AccountsFlask, plain: bool = False, format: None = None
+    ) -> None:
         super(DummyBackend, self).__init__(app)
         self.plain = plain
 
@@ -45,8 +46,11 @@ class DummyBackend(Backend):
         if not self.plain:
             body = "\n| ".join(body.split("\n"))
 
-        print(self.format.format(
-            subject=content.subject(),  # type: ignore
-            sender=content.sender(),  # type: ignore
-            to=recipient,
-            body=body))
+        print(
+            self.format.format(
+                subject=content.subject(),  # type: ignore
+                sender=content.sender(),  # type: ignore
+                to=recipient,
+                body=body,
+            )
+        )
diff --git a/accounts/backend/mail/sendmail.py b/accounts/backend/mail/sendmail.py
index 1fecedc..abaab87 100644
--- a/accounts/backend/mail/sendmail.py
+++ b/accounts/backend/mail/sendmail.py
@@ -10,26 +10,28 @@ from . import Backend
 
 
 def safe(s: str):
-    return s.split('\n', 1)[0]
+    return s.split("\n", 1)[0]
 
 
 class SendmailBackend(Backend):
     def _send(self, recipient: str, content: TemplateModule):
-        msg = MIMEText(content.body(), _charset='utf-8')  # type: ignore
-        msg['Subject'] = safe(content.subject())  # type: ignore
-        msg['To'] = safe(recipient)
-        msg['From'] = safe(content.sender())  # type: ignore
+        msg = MIMEText(content.body(), _charset="utf-8")  # type: ignore
+        msg["Subject"] = safe(content.subject())  # type: ignore
+        msg["To"] = safe(recipient)
+        msg["From"] = safe(content.sender())  # type: ignore
 
         envelope = []
         _, address = parseaddr(safe(content.sender()))  # type: ignore
-        if address != '':
-            envelope = ['-f', address]
+        if address != "":
+            envelope = ["-f", address]
 
-        p = subprocess.Popen([self.app.config['SENDMAIL_COMMAND']] +
-                             envelope + ['-t'], stdin=subprocess.PIPE)
+        p = subprocess.Popen(
+            [self.app.config["SENDMAIL_COMMAND"]] + envelope + ["-t"],
+            stdin=subprocess.PIPE,
+        )
         assert p.stdin
         p.stdin.write(msg.as_string().encode("utf-8"))
         p.stdin.close()
 
         if p.wait() != 0:
-            raise RuntimeError('sendmail terminated with %d' % p.returncode)
+            raise RuntimeError("sendmail terminated with %d" % p.returncode)