RFR: 8328697: SubMenuShowTest and SwallowKeyEvents tests stabilization

[Alexander Zvegintsev]

On Thu, 21 Mar 2024 14:25:36 GMT, Alexander Zuev <kizune at openjdk.org> wrote:

> Since you are editing these files you can also drop the @author tag from the test metadata. Otherwise looks good.

Sure,

author removed
../../../regtesthelpers -> /java/awt/regtesthelpers, 
moved whole block closer to class declaration

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PR Comment: https://git.openjdk.org/jdk/pull/18431#issuecomment-2012545559