Resolve Sphinx warnings

docs/conf.py

@@ -72,7 +72,7 @@ release = version
 #
 # This is also used if you do content translation via gettext catalogs.
 # Usually you set "language" from the command line for these cases.
-language = None
+language = "en"
 
 # List of patterns, relative to source directory, that match files and
 # directories to ignore when looking for source files.

parsedmarc/__init__.py

@@ -1226,6 +1226,7 @@ def watch_inbox(mailbox_connection: MailboxConnection,
     """
     Watches the mailbox for new messages and
       sends the results to a callback function
+
     Args:
         mailbox_connection: The mailbox connection object
         callback: The callback function to receive the parsing results