RFR: 8294158: HTML formatting for PassFailJFrame instructions

[Phil Race]

On Mon, 11 Sep 2023 13:11:10 GMT, Alexey Ivanov <aivanov at openjdk.org> wrote:

> This enhancement provides HTML formatting for instructions in the manual test framework, `PassFailJFrame`.
> 
> Some tests could benefit from rich-formatted instructions, especially when the instructions are long.
> 
> See a sample usage in #15661.

Marked as reviewed by prr (Reviewer).

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PR Review: https://git.openjdk.org/jdk/pull/15660#pullrequestreview-1695578095