RFR: 8366057: HotSpot Style Guide should permit trailing return types [v2]

[Kim Barrett]

> Please review this change to the HotSpot Style Guide to permit trailing return
> types for functions.
> 
> This is a modification of the Style Guide, so rough consensus among the
> HotSpot Group members is required to make this change. Only Group members
> should vote for approval (via the github PR), though reasoned objections or
> comments from anyone will be considered. A decision on this proposal will not
> be made before Monday 8-September-2025 at 12h00 UTC.
> 
> Since we're piggybacking on github PRs here, please use the PR review process
> to approve (click on Review Changes > Approve), rather than sending a "vote:
> yes" email reply that would be normal for a CFV.

Kim Barrett has updated the pull request with a new target base due to a merge or a rebase. The pull request now contains two commits:

 - Merge branch 'master' into trailing-return-type
 - permit trailing return types

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Changes: https://git.openjdk.org/jdk/pull/26923/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=26923&range=01
  Stats: 85 lines in 2 files changed: 81 ins; 0 del; 4 mod
  Patch: https://git.openjdk.org/jdk/pull/26923.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/26923/head:pull/26923

PR: https://git.openjdk.org/jdk/pull/26923