Merge branch 'stable-3.1' into stable-3.2

* stable-3.1:
  Support comment visibility
  Fix issues in actions documentation

Change-Id: I6ccb4fe4512803db7c935e481b0a83d5c6a7a6bd
tree: b28b8cf8bf604980fd26d02632f267c75b37664d
  1. .settings/
  2. src/
  3. .gitignore
  4. BUILD
  5. external_plugin_deps.bzl
  6. LICENSE