   * `:max_cases` - Maximum number of cases to run in parallel.
                    Defaults to `:erlang.system_info(:schedulers_online)`;
 
-  * `:trace` - Set ExUnit into trace mode, this set `:max_cases` to 1
+  * `:trace` - Set ExUnit into trace mode, this sets `:max_cases` to 1
                and prints each test case and test while running;
 
   """

      end

  To run the test above, all you need to do is to run the file
  using elixir from command line. Assuming you named your file
  assertion_test.exs, you can run it as:

      bin/elixir assertion_test.exs



  Mix is the project management and build tool for Elixir. Invoking `mix test`
  from the command line will run tests in each file matching the pattern
  `*_test.exs` found in the `test` directory of your project.

  By convention, you could also create a `test_helper.exs` file inside the
  `test` directory and put the code common to all tests there.

  The minimum example of a `test_helper.exs` file would be:

      # test/test_helper.exs
      ExUnit.start

  Then, in each test file, require `test_helper.exs` before defining test modules
  (or cases):

      # test/myproject_test.exs
