[jdk25u] RFR: 8361253: CommandLineOptionTest library should report observed values on failure

[duke]

On Tue, 23 Sep 2025 04:38:51 GMT, Jayashree S Kumar <duke at openjdk.org> wrote:

> A clean backport for [JDK-8361253](https://bugs.openjdk.org/browse/JDK-8361253)
> 
> This patch is to make CommandLineOptionTest library report observed values on failure rather than only report expected value when failing.
> 
> Backporting this patch can help fix debugging gap. 
> 
> Testing: mach5 tier1,tier2,tier3 & Oracle internal testing

@jaysk1 
Your change (at version 4f0078fb0af63a4e9b08fbfd5447973e96db11be) is now ready to be sponsored by a Committer.

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PR Comment: https://git.openjdk.org/jdk25u/pull/231#issuecomment-3333583566