 
   ## Examples
 
-      flunk "This should raise an error"
+      flunk("This should raise an error")
 
   """
   @spec flunk :: no_return


  ## Examples

      assert catch_exit(exit 1) == 1

  To assert exits from linked processes started from the test, trap exits
  with `Process.flag/2` and assert the exit message with `assert_received/2`.


  ## Examples

      send(self(), :hello)
      assert_received :hello

      send(self(), :bye)
      assert_received :hello, "Oh No!"
      ** (ExUnit.AssertionError) Oh No!
      Process mailbox:
