bpo-33820: Fix IDLE What's New typo (GH-7594)

(cherry picked from commit 820c53ac612e9c4b3cb3e831537a15d5e953bbc0)

Co-authored-by: Terry Jan Reedy <tjreedy@udel.edu>
diff --git a/Doc/whatsnew/3.6.rst b/Doc/whatsnew/3.6.rst
index 3feca6c..091481d 100644
--- a/Doc/whatsnew/3.6.rst
+++ b/Doc/whatsnew/3.6.rst
@@ -1177,7 +1177,7 @@
 maxlines.  Clicking on a context line jumps the editor to that line.  Context
 colors for custom themes is added to Highlights tab of Settings dialog.
 (Contributed by Cheryl Sabella and Terry Jan Reedy in :issue:`33642`,
-:issue:`33768`, and :issue:`33679`,
+:issue:`33768`, and :issue:`33679`)
 
 
 importlib