RFR: 8316003: Update FileChooserSymLinkTest.java to HTML instructions [v4]

Wed Oct 25 11:30:55 UTC 2023

> 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).

Alexey Ivanov has updated the pull request with a new target base due to a merge or a rebase. The pull request now contains eight commits:

 - Merge master
 - Amend indentation of nested <li> elements
 - Revert "Revert changes to FileChooserSymLinkTest.java"

   This reverts commit 7753b3f3e2d3a0df5fde672ad41833b6a9c6e247.
 - Wrap createUI call

   It reverts the accidental change where I unwrapped call to createUI
 - Revert changes to FileChooserSymLinkTest.java
 - Refactor configuration of a text component for instructions

   Each text component (JTextArea or JEditorPane) are configured
   in its own dedicated method. This avoids unnecessary type casts.
 - Improve instruction formatting
 - Enable HTML display if instructions start with <html>

   Instructions for FileChooserSymLinkTest are rendered in HTML.

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Changes: https://git.openjdk.org/jdk/pull/15661/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=15661&range=03
  Stats: 43 lines in 1 file changed: 13 ins; 0 del; 30 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