bpo-36277: Add document for pdb debug and retval commands (GH-12872)


https://bugs.python.org/issue36277

Automerge-Triggered-By: @csabella
(cherry picked from commit 9391f6c3ef24f7962c534c42ccb792debdbef509)

Co-authored-by: Dave Nguyen <dv@dvnguyen.com>
1 file changed