RFR: 8364768: JDK javax.imageio ImageWriters do not all flush the output stream [v2]

[Alexander Zvegintsev]

On Thu, 21 Aug 2025 19:14:52 GMT, Phil Race <prr at openjdk.org> wrote:

>> 4 of the 6 JDK ImageWriters flush the stream at the end of writing. 2 (TIFF and GIF) do not. 
>> 
>> This will matter if you are using a caching ImageOutputStream.
>> 
>> This fix makes it consistent.
>
> Phil Race has updated the pull request incrementally with one additional commit since the last revision:
> 
>   8364768

Marked as reviewed by azvegint (Reviewer).

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PR Review: https://git.openjdk.org/jdk/pull/26703#pullrequestreview-3143982088