RFR: 8253878: clean up nsk/share/jvmti/ArgumentHandler

[Chris Plummer]

On Wed, 30 Sep 2020 22:11:43 GMT, Igor Ignatyev <iignatyev at openjdk.org> wrote:

> Hi all,
> 
> could you please review this small patch which reformats `ArgumentHandler`, removes unused
> `findOptionStringValue(String name, String defaultValue)` method, fixes typos?

Marked as reviewed by cjplummer (Reviewer).

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PR: https://git.openjdk.java.net/jdk/pull/443