RFR: 8347063: Add comments in ClassFileFormatVersion for class file format evolution history [v2]

[Iris Clark]

On Mon, 6 Jan 2025 21:20:58 GMT, Chen Liang <liach at openjdk.org> wrote:

>> `javax.lang.model.SourceVersion` has a series of comments describing the new language features present in each source version. Similar comments for the `ClassFileFormatVersion` would be helpful, so readers no longer need to search through the JVMS to find changes in new versions.
>
> Chen Liang has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Add JEP/JSR numbers, clarify if something is attribute/modifier/etc.

Looks good.  Note that changes in JDK 7 and earlier pre-date JEPs, so no reference of that type is possible.

-------------

Marked as reviewed by iris (Reviewer).

PR Review: https://git.openjdk.org/jdk/pull/22934#pullrequestreview-2533029445