RFR: 6391806: JLabel and AbstractButton's imageUpdate method should be better specified [v3]

[Prasanta Sadhukhan]

On Tue, 28 Jun 2022 10:34:17 GMT, Abhishek Kumar <duke at openjdk.org> wrote:

>> JLabel and AbstractButton's imageUpdate method description updated.
>
> Abhishek Kumar has updated the pull request incrementally with one additional commit since the last revision:
> 
>   boolean value in description changed

please put newline at appropriate and logical position as it is crossing 80char per line..

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PR: https://git.openjdk.org/jdk/pull/9240