RFR: JDK-8268352: Rename javadoc Messager class to JavadocLog [v2]

[Pavel Rappo]

On Tue, 8 Jun 2021 17:04:37 GMT, Jonathan Gibbons <jjg at openjdk.org> wrote:

>> Please review a simple cleanup, to rename the javadoc Messager class to the more explicit, less-confusing name of JavadocLog, since it is the javadoc subtype of the javac Log class.
>> 
>> The new name is in line with other javadoc subtypes of javac classes.
>> 
>> The change only affects the javadoc.tool package; it does not affect any doclet packages, which use the `Reporter` interface, provided by `JavadocLog`.
>
> Jonathan Gibbons has updated the pull request incrementally with one additional commit since the last revision:
> 
>   address review feedback

Marked as reviewed by prappo (Reviewer).

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PR: https://git.openjdk.java.net/jdk/pull/4405