[3.6] bpo-29549: Fixes docstring for str.index (GH-256) by Mariatta · Pull Request #1028 · python/cpython

* Updates B.index documentation.

* Updates str.index documentation, makes it Argument Clinic compatible.

* Removes ArgumentClinic code.

* Finishes string.index documentation.

* Updates string.rindex documentation.

* Documents B.rindex.
(cherry picked from commit 43ba886)