Use msvcrt.getwch() for Windows pager.

Closes gh-1591

IPython/core/page.py

@@ -305,7 +305,7 b" if os.name == 'nt' and os.environ.get('TERM','dumb') != 'emacs':"
         @return:    True if need print more lines, False if quit
         """
         io.stdout.write('---Return to continue, q to quit--- ')
-        ans = msvcrt.getch()
+        ans = msvcrt.getwch()
         if ans in ("q", "Q"):
             result = False
         else: