RFR: JDK-8260388: Listing (sub)packages at package level of API documentation [v2]

[Hannes Wallnöfer]

On Fri, 12 Mar 2021 17:37:13 GMT, Jonathan Gibbons <jjg at openjdk.org> wrote:

>> Hannes Wallnöfer has updated the pull request with a new target base due to a merge or a rebase. The incremental webrev excludes the unrelated changes brought in by the merge/rebase. The pull request contains three additional commits since the last revision:
>> 
>>  - JDK-8260388: Show module column in related packages table if packages are in different modules
>>  - Merge branch 'master' into JDK-8260388
>>  - JDK-8260388: Listing (sub)packages at package level of API documentation
>
> All OK; some suggestions for future work/cleanup/improvement

I have added a change to this PR to add a "Module" column to the related packages table if any of the packages is in a different module. Example output for the JDK libraries is available here (`java.lang`, `java.util` and `com.sun.tools.*` packages have a module column):

http://cr.openjdk.java.net/~hannesw/8260388/api.03/

Implementation note: I added a HtmlStyle.colExtra CSS style because existing column classes either had unwanted rules (such as displaying links in bold font) or didn't fit for other reasons.

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PR: https://git.openjdk.java.net/jdk/pull/2917