old_contents: from flask import render_template, current_app
  from . import main
  import os
  
  @main.route('/')
  def index():
      return render_template('editor2.html')
  
new_contents: from flask import render_template, current_app
  from . import main
  import os
  
  @main.route('/')
  def index():
      return render_template('editor.html')
  
subject: Fix bug where wrong template name was used