RFR: 8300792: Refactor examples in java.net.http to use @snippet [v2]

[Darragh Clarke]

On Wed, 22 Feb 2023 16:02:16 GMT, Darragh Clarke <duke at openjdk.org> wrote:

>> Refactored instances of `@code` to instead use `@snippet`.
>> 
>> I also spent some time looking into using external snippets to reference the existing files `JavadocExamples` and `WebSocketExample` though ultimately thought it was better to keep the docs pretty much as they had been with only a few small changes to formatting.
>
> Darragh Clarke has updated the pull request incrementally with one additional commit since the last revision:
> 
>   cleaned up formatting, fixed snippets breaking when code sample starts on same line

Thanks for pointing that out, I pushed that change there

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PR: https://git.openjdk.org/jdk/pull/12692