RFR: 8298405: Implement JEP 467: Markdown Documentation Comments [v69]

[Chen Liang]

On Wed, 15 May 2024 21:04:36 GMT, Jonathan Gibbons <jjg at openjdk.org> wrote:

>> Please review a patch to add support for Markdown syntax in documentation comments, as described in the associated JEP.
>> 
>> Notable features:
>> 
>> * support for `///` documentation comments in `JavaTokenizer`
>> * new module `jdk.internal.md` -- a private copy of the `commonmark-java` library
>> * updates to `DocCommentParser` to treat `///` comments as Markdown
>> * updates to the standard doclet to render Markdown comments in HTML
>
> Jonathan Gibbons has updated the pull request incrementally with one additional commit since the last revision:
> 
>   update tests for dangling doc comments, per review feedback

My rationale for a potential preview is that we changed `-Xlint:dangling-doc-comments` as `///` is now dangling doc comment. Is this considered a Java programming language change? There were some community comments objecting the use of `///` for markdown documentation, and called for alternative syntaxes like `/*markdown */`.

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PR Comment: https://git.openjdk.org/jdk/pull/16388#issuecomment-2115466695