RFR: 8229186: Improve error messages for TestStringIntrinsics failures [v6]

[Evgeny Nikitin]

On Wed, 30 Sep 2020 21:19:03 GMT, Igor Ignatyev <iignatyev at openjdk.org> wrote:

> I'd use `StringBuilder` to construct the message.

Fixed, please check the f0b1df8.

> wouldn't the following patch do?

Wow, that worked. That type erasure... pushed in the same commit f0b1df8.

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PR: https://git.openjdk.java.net/jdk/pull/112