git: openjdk/jdk17u-dev: 8282548: Create a regression test for JDK-4330998

[Goetz Lindenmaier]

Changeset: 3258b672
Author:    Goetz Lindenmaier <goetz at openjdk.org>
Date:      2022-07-25 08:43:37 +0000
URL:       https://git.openjdk.org/jdk17u-dev/commit/3258b672d48b6baeaff91a207d3d26d5abc91a26

8282548: Create a regression test for JDK-4330998

Backport-of: b451273d209d9dfce3d7c4464defe0df523dfc7c

+ test/jdk/javax/swing/JEditorPane/4330998/JEditorPaneSetTextNullTest.java