old_contents: import os
  import platform
  import popen2
  
  from flask import Flask, request
  
  app = Flask(__name__)
  
  
  @app.route("/python2-specific")
  def python2_specific():
      """
      These tests are mostly included to check for extra paths that can be generated if
      we can track flow into the implementation of stdlib function, and then to an other sink.
      See comment in query for more details.
      """
  
      files = request.args.get("files", "")
      os.popen2("ls " + files)
      os.popen3("ls " + files)
      os.popen4("ls " + files)
  
      platform.popen("ls " + files)
  
      popen2.popen2("ls " + files)
      popen2.popen3("ls " + files)
      popen2.popen4("ls " + files)
      popen2.Popen3("ls " + files)
      popen2.Popen4("ls " + files)
  
new_contents: import os
  import platform
  import popen2
  
  from flask import Flask, request
  
  app = Flask(__name__)
  
  
  @app.route("/python2-specific")
  def python2_specific():
      """
      These tests are mostly included to check for extra paths that can be generated if
      we can track flow into the implementation of a stdlib function, and then to another sink.
      See comment in query for more details.
      """
  
      files = request.args.get("files", "")
      os.popen2("ls " + files)
      os.popen3("ls " + files)
      os.popen4("ls " + files)
  
      platform.popen("ls " + files)
  
      popen2.popen2("ls " + files)
      popen2.popen3("ls " + files)
      popen2.popen4("ls " + files)
      popen2.Popen3("ls " + files)
      popen2.Popen4("ls " + files)
  
subject: Fix grammar