old_contents: import flask
  import track
  
  app = flask.flask(__name__)
  
  @app.route("/")
  def root():
  	return "{} by {} - {}"
  
new_contents: import flask
  from . import track
  
  app = flask.flask(__name__)
  
  @app.route("/")
  def root():
  	return "{} by {} - {}"
  
subject: Fix track import for package