Use skip_if_not_win32 instead of skip_linux+osx

IPython/core/tests/test_run.py

@@ -119,8 +119,7 b' def doctest_run_option_parser_for_posix():'
     """
 
 
[e-mail]_linux
[e-mail]_osx
[e-mail]_if_not_win32
 def doctest_run_option_parser_for_windows():
     r"""Test option parser in %run (Windows specific).