Support for Markdown comments in the standard doclet. To enable Markdown in a comment, start the comment with `/**md` followed by whitespace. The syntax is as defined for CommonMark.
The work is in 3 parts: 1. Update the Compiler Tree API to support Markdown tree nodes, containing strings of (uninterpreted) Markdown source code. 2. Import commonmark-java into the `jdk.javadoc` module, to be able to convert Markdown strings to HTML. 3. Update the standard doclet, to leverage the preceding two parts, to translate Markdown in documentation comments to `Content` nodes. There are new tests both for the low level work in the Compiler Tree API, and for the overall high-level work in the doclet. ------------- Commit messages: - fix whitespace - JDK-8298405: Markdown support in the standard doclet Changes: https://git.openjdk.org/jdk/pull/11701/files Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=11701&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8298405 Stats: 9618 lines in 140 files changed: 9345 ins; 113 del; 160 mod Patch: https://git.openjdk.org/jdk/pull/11701.diff Fetch: git fetch https://git.openjdk.org/jdk pull/11701/head:pull/11701 PR: https://git.openjdk.org/jdk/pull/11701
