doc contains a section TESTS::

[mantepse]

Steps To Reproduce

See https://doc.sagemath.org/html/en/reference/calculus/index.html

Expected Behavior

Should certainly not contain a section TESTS::

Actual Behavior

see above

Additional Information

No response

Environment

irrelevant

Checklist

• I have searched the existing issues for a bug report that matches the one I want to file, without success.
• I have read the documentation and troubleshoot guide