     for testing. Defaults to `test/test_helper.exs`.
 
   * `:test_coverage` - the directory to include test coverage results.
-    Defaults to nil.
+    Defaults to `nil`.
 
   """
 


  ## Command line options

  * `--trace` - run tests with detailed reporting. Automatically set max cases to 1;
  * `--max-cases` - set the maximum number of cases running async;
  * `--cover` - the directory to include coverage results;
  * `--force` - forces compilation regardless of module times;


  This task will preload the `test/test_helper.exs` which
  should do all testing setup and then require all files
  that match the given `test_pattern` in parallel.

  Before running tests, it invokes the `App.Start` task
  which defaults to compile and load your project.

  A list of files can be given after the task name in
