RFR: 8370890: Start of release updates for JDK 27 [v7]

[Joe Darcy]

On Mon, 1 Dec 2025 08:53:37 GMT, Nizar Benalla <nbenalla at openjdk.org> wrote:

>> Get JDK 27 underway.
>
> Nizar Benalla has updated the pull request with a new target base due to a merge or a rebase. The incremental webrev excludes the unrelated changes brought in by the merge/rebase. The pull request contains 17 additional commits since the last revision:
> 
>  - problem list failing test
>  - Merge branch 'master' into start-of-release-27
>  - expand start of release documentation
>  - Merge branch 'master' into start-of-release-27
>  - Changes required for hard 80 character line limit
>  - Update --release 26 symbol information for JDK 26 build 25
>    The macOS/AArch64 build 25 was taken from https://jdk.java.net/26/
>  - revert MAX_COLUMNS to 80
>  - Update LATEST_MAJOR_VERSION in Versions.java
>  - Merge branch 'master' into start-of-release-27
>  - Merge branch 'master' into start-of-release-27
>  - ... and 7 more: https://git.openjdk.org/jdk/compare/04b667ed...e5214614

src/jdk.compiler/share/classes/com/sun/tools/javac/main/Option.java line 1368:

> 1366:     }
> 1367: 
> 1368:     private static String formatAbbreviatedList(Collection<String> values) {

I think changing the policy here is okay, but it should be better documented in comments here.

Additionally, it assume there will be a dense collection of supported values between the 4 th and (n-3) rd. That is currently the de facto policy, but is not ironclad. This assumption should also be documented.

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PR Review Comment: https://git.openjdk.org/jdk/pull/28130#discussion_r2578399308