fix dart example readme typo

allow copy and paste from readme

Use proto_library in proto_lang_toolchain.blacklisted_protos

spare people the time deleting $ from text.

Signed-off-by: Asra Ali <asraa@google.com>

Support for using proto_library in this attribute was added in:
https://github.com/bazelbuild/bazel/commit/a5ee2c4d979441e663cf53b2ace4daa05e5033d8

Legacy support for using .proto files will be removed in a future
version of Bazel.

* adding mvn install with snapshot version

* Added linkage monitor

* comment

* space

* Added comment

* Maven to use $HOME/.m2

* setting MVN

Setting up JDK8 for Kokoro jobs

Fix javadoc warnings in generated files

Down integrate to GitHub

Fix scope resolution for Google namespace

Merge 3.9.x into master

Merge master into 3.9.x

This should fix issue #6186. I also had to remove a couple unnecessary
const keywords in map_util.h because the no_warning_test was showing
errors about those.

Conflicts:
	java/lite/pom.xml
	java/util/pom.xml

3.8.x merge

This reverts commit 9a8ef05a.

Add extension number for protoc-gen-validate

Compatibility tests pull artifacts over HTTPS

Add `protobuf_java_lite` Bazel target

Otherwise, sandbox and remote execution will complain `google/protobuf/port_def.inc` doesn't exist.