RFR: JDK-8253733: Cleanup internal taglet API

[Pavel Rappo]

On Tue, 29 Sep 2020 16:42:09 GMT, Jonathan Gibbons <jjg at openjdk.org> wrote:

> This is a general cleanup of various classes related to the handling of tags and taglets in the standard doclet.
> 
> The initial motivation was to clean up static methods on `TagletWriter` that took a `TagletWriter` as a parameter.
> These methods are converted into instance methods, and the call sites simplified as well.
> Another area of cleanup is to make clear which methods are used for inline tags and which are used for block tags.
> 
> Some dead code is removed, and the doc comments are generally cleaned up as well.  More details are given in the JBS
> issue.

Changes requested by prappo (Reviewer).

src/jdk.javadoc/share/classes/jdk/javadoc/internal/doclets/toolkit/taglets/SimpleTaglet.java line 182:

> 180:     @Override
> 181:     public Content getInlineTagOutput(Element element, DocTree tag, TagletWriter writer) {
> 182:         return null;

I know that the corresponding `simpleTagOutput` method was deleted in this patch, but could you explain why this is a
valid substitution?

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PR: https://git.openjdk.java.net/jdk/pull/406