RFR: 8274898: Cleanup usages of StringBuffer in jdk tools modules

[David Holmes]

On Wed, 15 Dec 2021 17:59:54 GMT, Andrey Turbanov <duke at openjdk.java.net> wrote:

> > @turbanoff Only [Committers](https://openjdk.java.net/bylaws#committer) are allowed to sponsor changes.
> 
> But I am a Committer ��

You can't "sponsor" your own change. I suspect your Committer status changed after the bot initially checked your status way back in September. Not sure how often the bot will recheck that.

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PR: https://git.openjdk.java.net/jdk/pull/5433