Patch by Serhiy Storchaka.

and IDLE Help file.  (Thanks to Nick ODell and Todd Rovito for suggestions.)
Update Debug menu options in docs to match current code plus various other
minor IDLE doc and help edits.

Fix issue #16270: urllib may hang when used for retrieving files via FTP by using a context manager.

Fix issue #16270: urllib may hang when used for retrieving files via FTP by using a context manager.

Fix issue #16270: urllib may hang when used for retrieving files via FTP by using a context manager.

(Patch by Roger Serwy)

(Patch by Roger Serwy)

(thanks Serhiy).