Drupal 8.0.0 beta 12. More info: https://www.drupal.org/node/2514176

core/vendor/phpunit/php-token-stream/README.md

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+[![Build Status](https://travis-ci.org/sebastianbergmann/php-token-stream.svg?branch=master)](https://travis-ci.org/sebastianbergmann/php-token-stream)
+
+# PHP_TokenStream
+
+## Installation
+
+To add this package as a local, per-project dependency to your project, simply add a dependency on `phpunit/php-token-stream` to your project's `composer.json` file. Here is a minimal example of a `composer.json` file that just defines a dependency on PHP_TokenStream:
+
+    {
+        "require": {
+            "phpunit/php-token-stream": "~1.2"
+        }
+    }