`shell_format` work incorrect on windows.

[pahaz NA]

from sarge import shell_shlex, shell_format
import shlex
import subprocess

cmd = shell_format("python -c {0}", "print('aw')")
print(cmd)

This code produse:

C:\Users\pahaz_000>C:\Python27\python.exe z.py
python -c 'print('\''aw'\'')'

And on windows whis in incorrect:

C:\Users\pahaz_000\PycharmProjects\dokku>python -c 'print('\''aw'\'')'
  File "<string>", line 1
    'print('\''aw'\'')'
                      ^
SyntaxError: unexpected character after line continuation character

On linux correct:

(venv)root@precise64:/vagrant# python -c 'print('\''aw'\'')'
aw

[pahaz NA]

Sorry, I found in docs this "A simple run command which allows a rich subset of Bash-style shell command syntax, but parsed and run by sarge so that you can run on Windows without cygwin."

[pahaz NA]

windows support

[Vinay Sajip]

It's not suggested that you can pass a shell_formatted command line directly to cmd.exe - just that you should be able to run it compatibly in sarge, whether or not you're running cygwin.