code: def ensure_mingw_drive(win32_path):
      r
      win32_drive, _path = splitdrive(win32_path)
      mingw_drive = '/' + win32_drive[:-1].lower()
      mingw_path = mingw_drive + _path
      return mingw_path
docs: r""" replaces windows drives with mingw style drives
  
      Args:
          win32_path (str):
  
      CommandLine:
          python -m utool.util_path --test-ensure_mingw_drive
  
      Example:
          >>> # DISABLE_DOCTEST
          >>> from utool.util_path import *  # NOQA
          >>> win32_path = r'C:/Program Files/Foobar'
          >>> result = ensure_mingw_drive(win32_path)
          >>> print(result)
          /c/Program Files/Foobar