hg: jdk/sandbox: Merge

[andy.herrick at oracle.com]

Changeset: af9779f2d6bf
Author:    herrick
Date:      2019-11-12 10:09 -0500
URL:       https://hg.openjdk.java.net/jdk/sandbox/rev/af9779f2d6bf

Merge

- test/langtools/tools/javac/diags/examples/RestrictedTypeNotAllowedPreview.java