Error in Tutorial: Developing a “recipe” extension

[pya]

Describe the bug

The tutorial example recipe contains an error. Line 27 in recipe.py

        if 'contains' not in self.options:

should be

        if 'contains' in self.options:

i.e. without the not.

Currently, i.e. with the not, no entries in the recipe and ingredient indices are created. Hence the files recipe-ingredient.html and recipe-recipe.html are not generated for the given example. Removing not fixes this and generates these files.

How to Reproduce

Follow the instructions in recipe.

Expected behavior

Recipes and ingredients should be added to their respective indices. As a result, the files recipe-ingredient.html and recipe-recipe.html will be created.

Your project

None, trying the tutorial

Screenshots

No response

OS

independent

Python version

3.9

Sphinx version

3.5.4 (latest at the time)

Sphinx extensions

No response

Extra tools

No response

Additional context

No response