RFR: 8356108: Update SourceVersion.RELEASE_25 description for JEPs 511 and 512

[Joe Darcy]

On Fri, 2 May 2025 22:24:59 GMT, Chen Liang <liach at openjdk.org> wrote:

> Should we make this a simple source file?

That isn't necessary.

The purpose of this Versions.java test is focused on making sure setting --release has some effect for each release where a different source language is recognized. It is not attempting to be exhaustive that each new-in-release-N feature is accepted/rejected at appropriate source levels.

Per `javac` regression test conventions, the tests associated with a given feature should include negative tests that a new language construct is rejected on at least one older source/release version.

This test is more of a backstop insurance policy.

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PR Review Comment: https://git.openjdk.org/jdk/pull/25015#discussion_r2072256954