new_contents: import subprocess
  
  from vim_turing_machine.machines.merge_overlapping_intervals.decode_intervals import decode_intervals
  from vim_turing_machine.machines.merge_overlapping_intervals.encode_intervals import encode_intervals
  from vim_turing_machine.machines.merge_overlapping_intervals.merge_overlapping_intervals import MergeOverlappingIntervalsGenerator
  from vim_turing_machine.vim_constants import VIM_MACHINE_FILENAME
  from vim_turing_machine.vim_machine import VimTuringMachine
  
  
  NUM_BITS = 3
  
  
  def run_vim_machine(intervals):
      initial_tape = encode_intervals(intervals, NUM_BITS)
  
      gen = MergeOverlappingIntervalsGenerator(NUM_BITS)
      merge_overlapping_intervals = VimTuringMachine(gen.merge_overlapping_intervals_transitions(), debug=False)
  
      # Write to the vim machine file
      merge_overlapping_intervals.run(initial_tape=initial_tape)
  
      subprocess.run(
          [
              'vim',
              '-u',
              'vimrc',
              VIM_MACHINE_FILENAME,
              '-c',
              # Execute the vim machine and then save the resulting file
              ":execute 'normal gg0yy@\"' | :x",
          ],
          timeout=10,
          check=True,
      )
  
  
  def read_contents_of_tape():
      with open(VIM_MACHINE_FILENAME, 'r') as f:
          tape_lines = []
          found_beginning_of_tape = False
  
          for line in f:
              # Look for the lines between '_t:' and 'notvalid'
              if line.startswith('_t:'):
                  found_beginning_of_tape = True
              elif line.startswith('notvalid'):
                  return convert_tape_to_string(tape_lines)
              elif found_beginning_of_tape:
                  tape_lines.append(line)
  
      raise AssertionError('Could not find the tape')
  
  
  def convert_tape_to_string(tape_lines):
      return ''.join(tape_lines).replace(' ', '').replace('\n', '')
  
  
  def test_merge_intervals_in_vim():
      run_vim_machine([[1, 2], [2, 3], [5, 7]])
      tape = read_contents_of_tape()
  
      intervals = decode_intervals(tape, num_bits=NUM_BITS)
      assert intervals == [[1, 3], [5, 7]]
  
subject: Add an integration test for the vim machine.