old_contents: //
  // This is the first file loaded by RequireJS when on the web, because it is
  // referenced in the `data-main` attribute of the <script> tag in `index.html`. 
  //
  // Since the `cs` loader plugin and it's dependency, the coffee-script library,
  // isn't in the current directory, we have to map their short names to their
  // correct paths.
  //
  // Then we use the `cs` loader plugin to load and compile `src/app.coffee`,
  // which starts the app.
  //
  require({
      paths: {
          'cs': '../lib/cs',
          'coffee-script': '../lib/coffee-script'
      }
  }, ['cs!app']);
  
new_contents: //
  // This is the first file loaded by RequireJS when on the web, because it is
  // referenced in the `data-main` attribute of the <script> tag in `index.html`. 
  //
  // Since the `cs` loader plugin and its dependency, the coffee-script library,
  // isn't in the current directory, we have to map their short names to their
  // correct paths.
  //
  // Then we use the `cs` loader plugin to load and compile `src/app.coffee`,
  // which starts the app.
  //
  require({
      paths: {
          'cs': '../lib/cs',
          'coffee-script': '../lib/coffee-script'
      }
  }, ['cs!app']);
  
subject: Fix typo