code: function injectMocha(Mocha) {
      _injectPrototype(Console, Mocha.reporters.Base.prototype);
      _injectPrototype(HTML, Mocha.reporters.HTML.prototype);
      // Mocha doesn't expose its `EventEmitter` shim directly, so:
      _injectPrototype(MultiReporter, Object.getPrototypeOf(Mocha.Runner.prototype));
  }
docs: Yeah, hideous, but this allows us to be loaded before Mocha, which is handy.