git: openjdk/jdk-sandbox: json: Add test case for member equality w/ escapes

[duke]

Changeset: c48253d1
Branch: json
Author:    Justin Lu <justin.lu at oracle.com>
Date:      2025-01-09 10:41:13 +0000
URL:       https://git.openjdk.org/jdk-sandbox/commit/c48253d1728936c922f43d7a34ffca79841f956d

Add test case for member equality w/ escapes

! test/jdk/java/util/json/TestDuplicateKeys.java