Add additional diagnostics to macOS failure handler to assist with diagnosing MCast test failures
------------- Commit messages: - 8347994: fixing trailing whitespace - 8347994: Add additional diagnostics to macOS failure handler to assist with diagnosing MCast test failures Changes: https://git.openjdk.org/jdk/pull/23260/files Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=23260&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8347994 Stats: 7 lines in 1 file changed: 6 ins; 0 del; 1 mod Patch: https://git.openjdk.org/jdk/pull/23260.diff Fetch: git fetch https://git.openjdk.org/jdk.git pull/23260/head:pull/23260 PR: https://git.openjdk.org/jdk/pull/23260
