[3.13] gh-119856: Support exiting help() with just "exit" (GH-119858) (#119967)

gh-119856: Support exiting help() with just "exit" (GH-119858)
(cherry picked from commit 4223f1d)

Co-authored-by: Victor Stinner <[email protected]>

Author: miss-islington

Lib/pydoc.py

@@ -2008,7 +2008,7 @@ def interact(self):
             if (len(request) > 2 and request[0] == request[-1] in ("'", '"')
                     and request[0] not in request[1:-1]):
                 request = request[1:-1]
-            if request.lower() in ('q', 'quit'): break
+            if request.lower() in ('q', 'quit', 'exit'): break
             if request == 'help':
                 self.intro()
             else:
@@ -2060,7 +2060,7 @@ def intro(self):
 enter "modules spam".
 
 To quit this help utility and return to the interpreter,
-enter "q" or "quit".
+enter "q", "quit" or "exit".
 '''.format('%d.%d' % sys.version_info[:2]))
 
     def list(self, items, columns=4, width=80):