Make trie docs use explicit example

What does this MR do and why?

Make trie docs use explicit example

When I read these docs the first time I found them a little unclear because the input to Trie was not explicit but all the other arguments were using explicit examples. I was struggling to work out exactly what input is needed to get that output. It was in the comments but they weren't totally clear to me either.

References

Screenshots or screen recordings

Before	After

How to set up and validate locally

MR acceptance checklist

Evaluate this MR against the MR acceptance checklist. It helps you analyze changes to reduce risks in quality, performance, reliability, security, and maintainability.