Don't add unnecessary empty lines

[ferrarimarco]

Proposed changes

Strip the final newline from stout and stderr so that we don't add the empty line twice when logging.

Readiness checklist

In order to have this pull request merged, complete the following tasks.

Pull request author tasks

• I included all the needed documentation for this change.
• I provided the necessary tests.
• I squashed all the commits into a single commit.
• I followed the Conventional Commit v1.0.0 spec.
• I wrote the necessary upgrade instructions in the upgrade guide.
• If this pull request is about and existing issue,
  I added the Fix #ISSUE_NUMBER label to the description of the pull request.

Super-linter maintainer tasks

• Label as breaking if this change breaks compatibility with the previous released version.
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[ferrarimarco]

This was merged, but due to this GitHub incident, the merge operation stopped and didn't recover. When I rebased, the PR was marked as closed.