RFR: 8247957: remove doclint support for HTML 4 [v4]

[Jonathan Gibbons]

On Fri, 18 Dec 2020 01:34:15 GMT, Yoshiki Sato <ysatowse at openjdk.org> wrote:

>> HTML4 is no longer supported in javadoc.
>> 
>> doclint needs to drop HTML4 support as well.
>> The changes consist of:
>> * Removing jdk.javadoc.internal.doclint.HtmlVersion and its references.
>> * Sorting out supported tags and attributes in HTML5 (including fix incorrect permission of valign in TH, TR, TD, THEAD and TBODY)
>> * Modifying test code and expected outputs to be checked in HTML5
>
> Yoshiki Sato has updated the pull request incrementally with one additional commit since the last revision:
> 
>   5th: 8257204 and 8256313
>   8257204: Remove usage of -Xhtmlversion option from javac
>   8256313: JavaCompilation.gmk needs to be updated not to use --doclint-format html5 option

src/jdk.compiler/share/man/javac.1 line 638:

> 636: .RS
> 637: .RE
> 638: .TP

In general, you should not edit files like this; these files are generated from upstream Markdown files.

-------------

PR: https://git.openjdk.java.net/jdk/pull/893