业力错误'未捕获的ReferenceError：PR未定义'

Question

我是使用棱角分析Karma测试的新手。我按照这里的说明（http://www.ng-newsletter.com/advent2013/#!/day/19），并得到了这些错误：

Chrome 38.0.2125 (Mac OS X 10.10.0) ERROR
  Uncaught ReferenceError: PR is not defined
  at /public/shared/vendor/angular-1.2.21/docs/components/google-code-prettify-1.0.1/src/lang-apollo.js:28

Chrome 38.0.2125 (Mac OS X 10.10.0) ERROR
  Uncaught ReferenceError: PR is not defined
  at /public/shared/vendor/angular-1.2.21/docs/components/google-code-prettify-1.0.1/src/lang-clj.js:46

Chrome 38.0.2125 (Mac OS X 10.10.0) ERROR
  Uncaught ReferenceError: PR is not defined
  at /public/shared/vendor/angular-1.2.21/docs/components/google-code-prettify-1.0.1/src/lang-css.js:107

我不确定如何开始搞清楚这一点。有什么建议？我甚至不知道我应该为能够帮助我的人提供哪些其他信息:(

谢谢！