RFR: 8313983: jmod create --target-platform should replace existing ModuleTarget attribute

[Mandy Chung]

On Thu, 31 Aug 2023 12:13:40 GMT, Adam Sotona <asotona at openjdk.org> wrote:

> ModuleTarget and ModuleResolution attributes were flagged as 'allow multiple' in the Classfile API.
> This patch removed the flags and allows at most one instance of each attribute.
> 
> Please review.
> 
> Thanks,
> Adam

Would you consider documenting in the javadoc of XXXAttribute in the ClassFile API if it allows multiple?   It will make clear to the readers.

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PR Comment: https://git.openjdk.org/jdk/pull/15514#issuecomment-1701404915