old_contents: import os
  import platform
  
  from .generic import MeshScript
  from ..constants import log
  
  from distutils.spawn import find_executable
  
  _search_path = os.environ['PATH']
  if platform.system() == 'Windows':
      # split existing path by delimiter
      _search_path = [i for i in _search_path.split(';') if len(i) > 0]
      _search_path.append('C:\Program Files')
      _search_path.append('C:\Program Files (x86)')
      _search_path = ';'.join(_search_path)
      log.debug('searching for vhacd in: %s', _search_path)
  
  
  _vhacd_executable = None
  for _name in ['vhacd', 'testVHACD']:
      _vhacd_executable = find_executable(_name, path=_search_path)
      if _vhacd_executable is not None:
          break
  
  exists = _vhacd_executable is not None
  
  
  def convex_decomposition(mesh, **kwargs):
      if not exists:
          raise ValueError('No vhacd available!')
  
      argstring = ' --input $mesh_0 --output $mesh_post --log $script'
  
      # pass through extra arguments from the input dictionary
      for key, value in kwargs.items():
          argstring += ' --{} {}'.format(str(key),
                                         str(value))
  
      with MeshScript(meshes=[mesh],
                      script='',
                      tmpfile_ext='obj') as vhacd:
          result = vhacd.run(_vhacd_executable + argstring)
      return result
  
new_contents: import os
  import platform
  
  from .generic import MeshScript
  from ..constants import log
  
  from distutils.spawn import find_executable
  
  _search_path = os.environ['PATH']
  if platform.system() == 'Windows':
      # split existing path by delimiter
      _search_path = [i for i in _search_path.split(';') if len(i) > 0]
      _search_path.append(r'C:\Program Files')
      _search_path.append(r'C:\Program Files (x86)')
      _search_path = ';'.join(_search_path)
      log.debug('searching for vhacd in: %s', _search_path)
  
  
  _vhacd_executable = None
  for _name in ['vhacd', 'testVHACD']:
      _vhacd_executable = find_executable(_name, path=_search_path)
      if _vhacd_executable is not None:
          break
  
  exists = _vhacd_executable is not None
  
  
  def convex_decomposition(mesh, **kwargs):
      if not exists:
          raise ValueError('No vhacd available!')
  
      argstring = ' --input $mesh_0 --output $mesh_post --log $script'
  
      # pass through extra arguments from the input dictionary
      for key, value in kwargs.items():
          argstring += ' --{} {}'.format(str(key),
                                         str(value))
  
      with MeshScript(meshes=[mesh],
                      script='',
                      tmpfile_ext='obj') as vhacd:
          result = vhacd.run(_vhacd_executable + argstring)
      return result
  
subject: Use raw string for Windows paths