To demonstrate the functionality of HTML formatting in `PassFailJFrame`, I updated the instructions for the `test/jdk/javax/swing/JFileChooser/FileChooserSymLinkTest.java` test. The commands to create the symbolic links are marked up with monospace font, which makes them stand out. The test instructions for single- and multi-selection are emphasised with bold text.
This change depends on #15660 and [JDK-8294158](https://bugs.openjdk.org/browse/JDK-8294158). ------------- Commit messages: - Refactor configuration of a text component for instructions - Improve instruction formatting - Enable HTML display if instructions start with <html> Changes: https://git.openjdk.org/jdk/pull/15661/files Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=15661&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8316003 Stats: 84 lines in 2 files changed: 48 ins; 1 del; 35 mod Patch: https://git.openjdk.org/jdk/pull/15661.diff Fetch: git fetch https://git.openjdk.org/jdk.git pull/15661/head:pull/15661 PR: https://git.openjdk.org/jdk/pull/15661
