[docs] [issue21528] Fix a number of typos in the documentation

Roundup Robot added the comment: New changeset 33f6e360826e by Donald Stufft in branch '2.7': Fix Issue #21528 - Fix documentation typos https://hg.python.org/cpython/rev/33f6e360826e ---------- _______________________________________ Python tracker <report@bugs.python.org> <http://bugs.python.org/issue21528> _______________________________________