RFR: Cleaning up headers and examples [v2]

[Alexey Ivanov]

On Thu, 1 Sep 2022 15:44:28 GMT, Jesper Wilhelmsson <jwilhelm at openjdk.org> wrote:

> @aivanov-jdk Sorry, I didn't see your comments before integrating. I tried to remove the /integrate comment, but the bots were unusually fast today so they saw it anyway. I'll include your changes in my next patch.

Sounds good, thanks.

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PR: https://git.openjdk.org/guide/pull/90