i added one example because during the writing another part of the do…

[SirJamesClarkMaxwell]

Overview: What does this pull request change?

Motivation and Explanation: Why and how do your changes improve the library?

Added buff example for Arrow class
More code examples are almost always a good idea, especially if something is slightly silly in docs and could be potentially accessible to miss in roll docs.
I hope that this is correct syntax of the example code

Links to added or changed documentation pages

Further Information and Comments

Reviewer Checklist

• The PR title is descriptive enough for the changelog, and the PR is labeled correctly
• If applicable: newly added non-private functions and classes have a docstring including a short summary and a PARAMETERS section
• If applicable: newly added functions and classes are tested

[JasonGrace2282]

I don't think this is a valuable addition to the library. A whole example just related to the buff parameter seems to me like a waste of rendering time with minimal benefit.