Fix Flake8 E501 (line too long) error

aiosmtpd/docs/_exts/autoprogramm.py

@@ -46,13 +46,16 @@
 __all__ = ("AutoprogrammDirective", "import_object", "scan_programs", "setup")
 
 
-# Need to temporarily disable this particular check, because although this function is guaranteed to return a proper
-# value (due to how ArgumentParser works), pytype doesn't really know that, and therefore raised an error
-# in the (to its view) possible fallthrough of "implicit return None" if the "for a" loop exits without finding the
-# right item.
+# Need to temporarily disable this particular check, because although this function
+# is guaranteed to return a proper value (due to how ArgumentParser works), pytype
+# doesn't really know that, and therefore raised an error  in the (to its view)
+# possible fallthrough of "implicit return None" if the "for a" loop exits without
+# finding the right item.
 #
 # pytype: disable=bad-return-type
-def get_subparser_action(parser: argparse.ArgumentParser) -> argparse._SubParsersAction:
+def get_subparser_action(
+    parser: argparse.ArgumentParser
+) -> argparse._SubParsersAction:
     neg1_action = parser._actions[-1]
 
     if isinstance(neg1_action, argparse._SubParsersAction):