RFR: 8353545: Improve debug info for StartOptionTest

Wed Apr 2 13:17:53 UTC 2025

On Wed, 2 Apr 2025 11:06:17 GMT, Jan Lahoda <jlahoda at openjdk.org> wrote:

> The `jdk/jshell/ToolProviderTest.java` is intermittently failing. It is not clear why, so this PR attempts to add some more debug info (printing all the remaining output when the output check fails), which hopefully will help to determine the cause of the failures.

Looks good to me.

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Marked as reviewed by asotona (Reviewer).

PR Review: https://git.openjdk.org/jdk/pull/24376#pullrequestreview-2736242394