Suppress auto_rewrite of exit autocall.

IPython/core/autocall.py

@@ -36,6 +36,7 b' class IPyAutocall(object):'
     develop macro-like mechanisms.
     """
     _ip = None
+    rewrite = True
     def __init__(self, ip=None):
         self._ip = ip
     
@@ -51,6 +52,7 b' class IPyAutocall(object):'
 class ExitAutocall(IPyAutocall):
     """An autocallable object which will be added to the user namespace so that
     exit, exit(), quit or quit() are all valid ways to close the shell."""
+    rewrite = False
     
     def __call__(self):
         self._ip.ask_exit()

IPython/core/prefilter.py

@@ -894,7 +894,7 b' class AutoHandler(PrefilterHandler):'
             return line
 
         force_auto = isinstance(obj, IPyAutocall)
-        auto_rewrite = True
+        auto_rewrite = getattr(obj, 'rewrite', True)
         
         if pre == ESC_QUOTE:
             # Auto-quote splitting on whitespace