RFR: Cleanup contractions [v2]

[Iris Clark]

On Thu, 4 Feb 2021 02:55:01 GMT, Jesper Wilhelmsson <jwilhelm at openjdk.org> wrote:

>> An attempt to unify the language in the guide with regards to contractions. There was a (very brief) discussion on this on the mailing list: https://mail.openjdk.java.net/pipermail/guide-dev/2020-December/000444.html
>> 
>> is not --> isn't
>> do not --> don't
>> are not --> aren't
>> etc
>
> Jesper Wilhelmsson has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Updated description of trivial

Marked as reviewed by iris (Reviewer).

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PR: https://git.openjdk.java.net/guide/pull/42