old_contents: r"""
  This is a script that can be used to run tests that require multiple
  executables to be run e.g. those client-server tests.
  
  Usage:
    python vtkTestDriver.py --process exe1 arg11 arg12 ...
                            --process exe2 arg21 arg22 ...
                            --process ...
  """
  
  import sys
  import subprocess
  
  # Extract arguments for each process to execute.
  command_lists = []
  prev = None
  for idx in range(1, len(sys.argv)):
      if sys.argv[idx] == "--process":
          if prev:
              command_lists.append(sys.argv[prev:idx])
          prev = idx+1
  if prev <= len(sys.argv):
      command_lists.append(sys.argv[prev:])
  
  procs = []
  for cmdlist in command_lists:
      print "Executing '", " ".join(cmdlist), "'"
      proc = subprocess.Popen(cmdlist)
      procs.append(proc)
  
  # Now wait for each of the processes to terminate.
  # If ctest times out, it will kill this process and all subprocesses will be
  # terminated anyways, so we don't need to handle timeout specially.
  for proc in procs:
      proc.wait()
  
  for proc in procs:
      if proc.returncode != 0:
          print "ERROR: A process exited with error. Test will fail."
          sys.exit(1) # error
  print "All's well!"
  
new_contents: r"""
  This is a script that can be used to run tests that require multiple
  executables to be run e.g. those client-server tests.
  
  Usage:
    python vtkTestDriver.py --process exe1 arg11 arg12 ...
                            --process exe2 arg21 arg22 ...
                            --process ...
  """
  
  import sys
  import subprocess
  import time
  
  # Extract arguments for each process to execute.
  command_lists = []
  prev = None
  for idx in range(1, len(sys.argv)):
      if sys.argv[idx] == "--process":
          if prev:
              command_lists.append(sys.argv[prev:idx])
          prev = idx+1
  if prev <= len(sys.argv):
      command_lists.append(sys.argv[prev:])
  
  procs = []
  for cmdlist in command_lists:
      print >> sys.stderr, "Executing '", " ".join(cmdlist), "'"
      proc = subprocess.Popen(cmdlist)
      procs.append(proc)
      # sleep to ensure that the process starts.
      time.sleep(0.1)
  
  # Now wait for each of the processes to terminate.
  # If ctest times out, it will kill this process and all subprocesses will be
  # terminated anyways, so we don't need to handle timeout specially.
  for proc in procs:
      proc.wait()
  
  for proc in procs:
      if proc.returncode != 0:
          print >> sys.stderr, "ERROR: A process exited with error. Test will fail."
          sys.exit(1) # error
  print "All's well!"
  
subject: Add a delay between process launches.