[jdk21u-dev] RFR: 8330011: [s390x] update block-comments to make code consistent [v2]

[Amit Kumar]

> Hi all,
> 
> This pull request contains a backport of commit [01bda278](https://github.com/openjdk/jdk/commit/01bda278d6a498ca89c0bc5218680cd51a04e9d3) from the [openjdk/jdk](https://git.openjdk.org/jdk) repository.
> 
> The commit being backported was authored by Amit Kumar on 17 Apr 2024 and was reviewed by Lutz Schmidt.
> 
> Thanks!

Amit Kumar 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 two additional commits since the last revision:

 - Merge branch 'master' into backport-offamitkumar-01bda278
 - Backport 01bda278d6a498ca89c0bc5218680cd51a04e9d3

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

Changes:
  - all: https://git.openjdk.org/jdk21u-dev/pull/539/files
  - new: https://git.openjdk.org/jdk21u-dev/pull/539/files/5b91fd15..596a9d0d

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk21u-dev&pr=539&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk21u-dev&pr=539&range=00-01

  Stats: 1040 lines in 125 files changed: 501 ins; 228 del; 311 mod
  Patch: https://git.openjdk.org/jdk21u-dev/pull/539.diff
  Fetch: git fetch https://git.openjdk.org/jdk21u-dev.git pull/539/head:pull/539

PR: https://git.openjdk.org/jdk21u-dev/pull/539