Integrated: Cleaning up headers and examples

[Jesper Wilhelmsson]

On Mon, 22 Aug 2022 15:22:54 GMT, Jesper Wilhelmsson <jwilhelm at openjdk.org> wrote:

> * Make all headers follow the same style
> * Make code examples use ~~~ instead of four space indentation
> * Fix email adresses to be actual adresses
> * Add link to jtreg FAQ
> * Add comment about the name space for noreg-labels

This pull request has now been integrated.

Changeset: 57ae55f1
Author:    Jesper Wilhelmsson <jwilhelm at openjdk.org>
URL:       https://git.openjdk.org/guide/commit/57ae55f159ec5d6091910fe80b68adee602255b5
Stats:     91 lines in 6 files changed: 29 ins; 0 del; 62 mod

Cleaning up headers and examples

Reviewed-by: iris, smarks

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