diff --git a/backup_imap/backup_imap.py b/backup_imap/backup_imap.py
index 25f7137..fa33d5b 100644
--- a/backup_imap/backup_imap.py
+++ b/backup_imap/backup_imap.py
@@ -122,7 +122,7 @@ class BackupImap:
             msg_counter = 1
             for message_uid in all_msgs_uids:
                 self._log.debug(
-                    "Processing message '%s' (%s/%s)",
+                    "Processing message %s (%s/%s)",
                     message_uid.decode(),
                     msg_counter,
                     len(all_msgs_uids)
@@ -173,7 +173,12 @@ class BackupImap:
                         try:
                             with open(message_path, 'wb') as file_pointer:
                                 file_pointer.write(data)
-                            self.data['backedup_messages'].append({ "message_id": message_id, "mailbox": mailbox})
+                            self.data['backedup_messages'].append(
+                                {
+                                    "message_id": message_id,
+                                    "mailbox": mailbox
+                                }
+                            )
                             self._save_cached_data(self.data)
                         except OSError as error:
                             if error.errno == 36: # File name too long
@@ -183,7 +188,12 @@ class BackupImap:
                                 )
                                 with open(message_path, 'wb') as file_pointer:
                                     file_pointer.write(data)
-                                self.data['backedup_messages'].append({ "message_id": message_id, "mailbox": mailbox})
+                                self.data['backedup_messages'].append(
+                                    {
+                                        "message_id": message_id,
+                                        "mailbox": mailbox
+                                    }
+                                )
                                 self._save_cached_data(self.data)
                             else:
                                 self._log.error(