Adding doctests in simpson_rule.py (#10269)

* Adding doctests in simpson_rule.py

* [pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

* Update maths/simpson_rule.py

Co-authored-by: Christian Clauss <[email protected]>

* Update maths/simpson_rule.py

Co-authored-by: Christian Clauss <[email protected]>

* Adding doctests in simpson_rule.py

* [pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

* Adding doctests in simpson_rule.py

* [pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

* Adding doctests in simpson_rule.py

* [pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

* Adding doctests in simpson_rule.py

* [pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

* Adding doctests in simpson_rule.py

* [pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

* Update simpson_rule.py

* Adding doctests in simpson_rule.py

* Adding doctests in simpson_rule.py

---------

Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>
Co-authored-by: Christian Clauss <[email protected]>