RFR: 8264484: Replace uses of StringBuffer with StringBuilder in jdk.hotspot.agent [v3]

[Andrey Turbanov]

On Wed, 31 Mar 2021 16:35:32 GMT, Kevin Walls <kevinw at openjdk.org> wrote:

>> done
>
> Thanks - just a nit, looks like an extra space means "return genBaseHref() ..etc.." is not aligned.

fixed

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PR: https://git.openjdk.java.net/jdk/pull/3275