RFR: 8209038: Clarify the javadoc of Cipher.getParameters() [v2]

[Valerie Peng]

On Wed, 13 Apr 2022 22:04:03 GMT, Valerie Peng <valeriep at openjdk.org> wrote:

>> Anyone can help review this javadoc update? The main change is the wording for the method javadoc of Cipher.getParameters()/CipherSpi.engineGetParameters(). The original wording is somewhat restrictive and request is to broaden this to accommodate more scenarios such as when null can be returned.
>> The rest are minor things like add {@code } to class name and null, and remove redundant ".". 
>> 
>> Will file CSR after the review is close to being wrapped up.
>> Thanks~
>
> Valerie Peng has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Update w/ review feedbacks

CSR is filed at: https://bugs.openjdk.java.net/browse/JDK-8284897
Please review, thanks!

-------------

PR: https://git.openjdk.java.net/jdk/pull/8117