[gnulib-tool-py] end-of-line conventions

[Bruno Haible]

Hi Dmitriy,

Nice to see that you added some unit tests already.

One remark here:
  if message_sh[-2:] == '\r\n':
    message_sh = message_sh.replace('\r\n', '\n')
  elif message_sh[-1] == '\r':
    message_sh = message_sh.replace('\r', '\n')

The first two lines are for Windows end-of-line conventions, clearly.
But the next two lines could only happen on MacOS 9 and earlier systems.
Such systems are not in use anymore nowadays. (In MacOS X Apple has
adopted the Unix end-of-line conventions.) IMO you can remove these two
lines.

Bruno