RFR: 7903866: apidiff: add an example to the doc [v3]

[Jonathan Gibbons]

On Sun, 20 Oct 2024 13:33:40 GMT, Andrew Haley <aph at openjdk.org> wrote:

>> It's an example, for example. We need more.
>
> Andrew Haley has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Add an example

My intent is to develop a section in the doc containing real, verified examples (backed up by some form of test script.)  My thought is to start with the smallest command-line for testing 2 JDK builds, and to build up from there. I'd like to illustrate that the command line is not that complicated!  You should have seen it before the `--jdk-build` option was introduced.

That all being said, it will take a (short) while to develop that update, so I'll approve this example as either an interim measure or as part of what is to come.

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Marked as reviewed by jjg (Reviewer).

PR Review: https://git.openjdk.org/apidiff/pull/26#pullrequestreview-2386473901