RFR: 8264484: Replace uses of StringBuffer with StringBuilder in jdk.hotspot.agent [v2]

[Andrey Turbanov]

On Wed, 31 Mar 2021 08:23:24 GMT, Yasumasa Suenaga <ysuenaga at openjdk.org> wrote:

>> Andrey Turbanov has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   8264484: Replace uses of StringBuffer with StringBuilder in jdk.hotspot.agent
>>   
>>   remove redundant local variables as suggested by reviewers
>
> src/jdk.hotspot.agent/share/classes/sun/jvm/hotspot/runtime/VMVersionMismatchException.java line 40:
> 
>> 38:                 ". Target VM is " + targetVersion;
>> 39:         return msg;
>> 40:     }
> 
> Why don't you return `msg` directly? I think `msg` is not needed.
> I saw similar codes in other places.

inlined

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