Compare
https://github.com/OAI/OpenAPI-Specification/blob/master/versions/3.1.0.md#style-examples
with
https://spec.openapis.org/oas/v3.1.0.html#style-examples

The HTML version displays some characters incorrectly:

• displays | as ¦
• displays color[R]=... as color\R=...

The problem is with all 3.x.x HTML versions.

Screenshots: