[docs] [issue16518] add "buffer protocol" to glossary

Roundup Robot added the comment: New changeset e7e8a218737a by R David Murray in branch 'default': #16518: Bring error messages in harmony with docs ("bytes-like object") https://hg.python.org/cpython/rev/e7e8a218737a ---------- _______________________________________ Python tracker <report@bugs.python.org> <http://bugs.python.org/issue16518> _______________________________________