RFR: 8349003: NativeCallStack::print_on() output is unreadable

[Thomas Stuefe]

On Wed, 29 Jan 2025 22:00:08 GMT, Zhengyu Gu <zgu at openjdk.org> wrote:

> Please review this trivial change that improves output readability.

I don't understand, where did we break this? Did I break this with [8333994](https://github.com/openjdk/jdk/pull/19655/files#top)?

If so, why did NMT tests not fall all over the place? They should have catched such a regression.

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PR Comment: https://git.openjdk.org/jdk/pull/23359#issuecomment-2623733529