From 0e79b7e92cf0d2606e17cb96a60c751c5b837604 Mon Sep 17 00:00:00 2001
From: Eli Bendersky <eliben@gmail.com>
Date: Mon, 14 Nov 2011 01:16:31 +0200
Subject: [PATCH] Clarify the existence of the <> operator in Grammar/Grammar
 with a comment, for issue 13239

---
 Grammar/Grammar | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/Grammar/Grammar b/Grammar/Grammar
index 89f4c3614ed..cea68de24c4 100644
--- a/Grammar/Grammar
+++ b/Grammar/Grammar
@@ -88,6 +88,8 @@ or_test: and_test ('or' and_test)*
 and_test: not_test ('and' not_test)*
 not_test: 'not' not_test | comparison
 comparison: expr (comp_op expr)*
+# <> isn't actually a valid comparison operator in Python. It's here for the
+# sake of a __future__ import described in PEP 401
 comp_op: '<'|'>'|'=='|'>='|'<='|'<>'|'!='|'in'|'not' 'in'|'is'|'is' 'not'
 star_expr: '*' expr
 expr: xor_expr ('|' xor_expr)*