RFR: 8290313: Produce warning when user specified java.io.tmpdir directory doesn't exist [v4]

[Naoto Sato]

On Fri, 18 Nov 2022 18:36:51 GMT, Weibing Xiao <duke at openjdk.org> wrote:

>> print warning message for java.io.tmpdir when it is set through the command line and the value is not good for creating file folder.
>
> Weibing Xiao has updated the pull request incrementally with one additional commit since the last revision:
> 
>   updated from the review comment

Marked as reviewed by naoto (Reviewer).

test/jdk/java/io/File/TempDirDoesNotExist.java line 117:

> 115:                     + "\n" + originalOutput.asLines().toString());
> 116:     }
> 117: }

Nit: need a newline at the end

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PR: https://git.openjdk.org/jdk/pull/11174