old_contents: import flask
  from flask import request, render_template, flash, redirect, url_for
  from flask_login import login_user
  
  from ..models import User
  from ..utils.auth import is_safe_url
  
  from ..auth_provider import KnowledgeAuthProvider
  
  
  class DebugAuthProvider(KnowledgeAuthProvider):
      _registry_keys = ['debug']
  
      def prompt(self):
          if request.method == 'POST':
              user = request.form['username']
              login_user(User(identifier=user))
  
              flash('Logged in successfully.')
  
              next = request.args.get('next')
              # is_safe_url should check if the url is safe for redirects.
              # See http://flask.pocoo.org/snippets/62/ for an example.
              if not is_safe_url(next):
                  return flask.abort(400)
  
              return redirect(next or url_for('index.render_feed'))
          return render_template('auth-login-form.html', skip_password=True)
  
      def get_user(self):
          return User(identifier=request.form['username'])
  
new_contents: from ..auth_provider import KnowledgeAuthProvider
  from ..models import User
  from ..utils.auth import is_safe_url
  import flask
  from flask import (
      flash,
      redirect,
      render_template,
      request,
      url_for,
  )
  from flask_login import login_user
  
  
  class DebugAuthProvider(KnowledgeAuthProvider):
      _registry_keys = ['debug']
  
      def prompt(self):
          if request.method == 'POST':
              user = request.form['username']
              login_user(User(identifier=user))
  
              flash('Logged in successfully.')
  
              next = request.args.get('next')
              # is_safe_url should check if the url is safe for redirects.
              # See http://flask.pocoo.org/snippets/62/ for an example.
              if not is_safe_url(next):
                  return flask.abort(400)
  
              return redirect(next or url_for('index.render_feed'))
          return render_template('auth-login-form.html', skip_password=True)
  
      def get_user(self):
          return User(identifier=request.form['username'])
  
subject: Adjust import statements to be sorted