old_contents: from flask import render_template
  
  def crypto_template(template, **context):
      return render_template('main.html', render_template(template, **context))
  
new_contents: from flask import render_template
  
  def crypto_template(template, **context):
      return render_template('main.html', content = render_template(template, **context))
  
subject: Fix main template