bug#18596: 25.0.50; MS-Windows needs a different default for python-shell-interpreter-args

[Eli Zaretskii <eliz@gnu.org>]

With the default value, 'run-python' hangs in accept-process-output.
This fixes that for me:

--- lisp/progmodes/python.el~0	2014-10-01 06:33:59 +0300
+++ lisp/progmodes/python.el	2014-10-01 18:10:48 +0300
@@ -1739,7 +1739,8 @@
   :group 'python
   :safe 'stringp)
 
-(defcustom python-shell-interpreter-args "-i"
+(defcustom python-shell-interpreter-args
+  (if (eq system-type 'windows-nt) "-i -u" "-i")
   "Default arguments for the Python interpreter."
   :type 'string
   :group 'python)


In GNU Emacs 25.0.50.10 (i686-pc-mingw32)
 of 2014-10-01 on HOME-C4E4A596F7
Repository revision: 117996 dmantipov@yandex.ru-20141001132108-zdsxru2390mqyjlu
Windowing system distributor `Microsoft Corp.', version 5.1.2600
Configured using:
 `configure --prefix=/d/usr --enable-checking=yes,glyphs 'CFLAGS=-O0
 -g3''

Configured features:
XPM JPEG TIFF GIF PNG RSVG SOUND NOTIFY ACL GNUTLS LIBXML2 ZLIB

Important settings:
  value of $LANG: ENU
  locale-coding-system: cp1255

Major mode: Lisp Interaction

Minor modes in effect:
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  font-lock-mode: t
  blink-cursor-mode: t
  auto-composition-mode: t
  auto-encryption-mode: t
  auto-compression-mode: t
  line-number-mode: t

Recent input:
M-x r e p o r t - e m <tab> <return>

Recent messages:
For information about GNU Emacs and the GNU system, type C-h C-a.

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Features:
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Memory information:
((conses 8 78619 5657)
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