RFR: 8267329: Modernize Javadoc code to use instanceof with pattern matching [v3]

[Ian Graves]

On Wed, 19 May 2021 16:57:04 GMT, Ian Graves <igraves at openjdk.org> wrote:

>> 8267329: Modernize Javadoc code to use instanceof with pattern matching
>
> Ian Graves has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Name shortening. Copyright updates.

No problem. All good suggestions. We can wait until there are more eyes on before proceeding.

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PR: https://git.openjdk.java.net/jdk/pull/4105