bpo-33822: Add IDLE section of What's New 3.8 (GH-15035)


* bpo-33822: Add IDLE section of What's New 3.8

* Fix role.
(cherry picked from commit a72ca90eb9f13ee2abc7e19b669974d2d0b3d63e)

Co-authored-by: Terry Jan Reedy <tjreedy@udel.edu>
1 file changed