New templates + add Documentation (Sourcery refactored)

[sourcery-ai]

Pull Request #50 refactored by Sourcery.

If you're happy with these changes, merge this Pull Request using the Squash and merge strategy.

NOTE: As code is pushed to the original Pull Request, Sourcery will
re-run and update (force-push) this Pull Request with new refactorings as
necessary. If Sourcery finds no refactorings at any point, this Pull Request
will be closed automatically.

See our documentation here.

Run Sourcery locally

Reduce the feedback loop during development by using the Sourcery editor plugin:

• VS Code
• PyCharm

Review changes via command line

To manually merge these changes, make sure you're on the new-templates branch, then run:

git fetch origin sourcery/new-templates
git merge --ff-only FETCH_HEAD
git reset HEAD^

Help us improve this pull request!

[sourcery-ai]

Function GeneratorAuto.summary refactored with the following changes:

• Replace assignment and augmented assignment with single assignment (merge-assign-and-aug-assign)