old_contents: from flask import Flask, request
  from jinja2 import Template
  
  app = Flask(__name__)
  
  @app.route("/")
  def index():
      name = request.get.get('name')
  
      t = Template("Hello {{ %s }} " % name)
      return t.render()
  
  if __name__ == "__main__":
      app.run()
new_contents: from flask import Flask, request
  from jinja2 import Template
  
  app = Flask(__name__)
  
  @app.route("/")
  def index():
      name = request.args.get('name')
  
      t = Template("Hello {{ %s }} " % name)
      return t.render()
  
  if __name__ == "__main__":
      app.run()
subject: fix a bug