IListeningPort.stopListening is incorrectly typed

[twisted-trac]

	@wiml reported
Trac ID	trac#10179
Type	defect
Created	2021-04-19 02:33:51Z
Branch	https://github.com/twisted/twisted/tree/stopListening-returns-deferred

Minor error in ticket:10002

Searchable metadata

trac-id__10179 10179
type__defect defect
reporter__wiml wiml
priority__normal normal
milestone__None None
branch__stopListening_returns_deferred stopListening-returns-deferred
branch_author__ 
status__closed closed
resolution__fixed fixed
component__core core
keywords__mypy mypy
time__1618799631673714 1618799631673714
changetime__1620097287934989 1620097287934989
version__None None
owner__wiml wiml

[twisted-trac]

	@wiml commented

PR is here #1586

[twisted-trac]

	@wsanchez set owner to @wiml

[twisted-trac]

	@wiml set status to closed

In changeset f2cd548

#!CommitTicketReference repository="" revision="f2cd548afd26317044544d99bf276bcb861476d7"
Merge pull request #1586 from twisted/stopListening-returns-deferred

Author: wiml
Reviewer: wsanchez
Fixes: ticket:10179

10179: IListeningPort.stopListening() can return a deferred.