old_contents: from flask import Flask
  app = Flask(__name__)
  
  @app.route("/")
  def main():
      return "Welcome!"
  
  if __name__ == "__main__":
      app.run()
  
new_contents: from flask import Flask
  app = Flask(__name__)
  
  @app.route("/")
  def main():
      return "Welcome!"
  
  def parse_reflog():
      pass
  
  if __name__ == "__main__":
      app.run()
  
subject: Add template for parse_reflog function