JDK-8284362 highlighted some issues with formatting of top-level doc comments. This PR fixes those issues and similar issues elsewhere in jdk.javadoc.
------------- Commit messages: - Update copyright years - Initial commit Changes: https://git.openjdk.java.net/jdk/pull/8126/files Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=8126&range=00 Issue: https://bugs.openjdk.java.net/browse/JDK-8284387 Stats: 174 lines in 62 files changed: 2 ins; 41 del; 131 mod Patch: https://git.openjdk.java.net/jdk/pull/8126.diff Fetch: git fetch https://git.openjdk.java.net/jdk pull/8126/head:pull/8126 PR: https://git.openjdk.java.net/jdk/pull/8126
