The following issues are reported regarding headings in documentation comments.
For a general background information, see this message to jdk-dev@ojn.
   https://mail.openjdk.java.net/pipermail/jdk-dev/2019-March/002671.html



open/src/java.instrument/share/classes/java/lang/instrument/package-info.java:55: Note: missing heading <h2>
 * <h3>Starting an Agent from the Command-Line Interface</h3>
   ^