From 5cac46dd413766411dc12758d53b6a7e6b691171 Mon Sep 17 00:00:00 2001
From: Jack Diederich <jackdied@gmail.com>
Date: Mon, 22 Feb 2010 21:27:38 +0000
Subject: * fix issue#7476

---
 Lib/pipes.py           | 3 +++
 Lib/test/test_pipes.py | 2 ++
 Misc/ACKS              | 1 +
 3 files changed, 6 insertions(+)

diff --git a/Lib/pipes.py b/Lib/pipes.py
index 6dcc997..25e9915 100644
--- a/Lib/pipes.py
+++ b/Lib/pipes.py
@@ -267,10 +267,13 @@ _safechars = string.ascii_letters + string.digits + '!@%_-+=:,./' # Safe unquote
 _funnychars = '"`$\\'                           # Unsafe inside "double quotes"
 
 def quote(file):
+    ''' return a shell-escaped version of the file string '''
     for c in file:
         if c not in _safechars:
             break
     else:
+        if not file:
+            return "''"
         return file
     if '\'' not in file:
         return '\'' + file + '\''
diff --git a/Lib/test/test_pipes.py b/Lib/test/test_pipes.py
index d1053e8..a638598 100644
--- a/Lib/test/test_pipes.py
+++ b/Lib/test/test_pipes.py
@@ -76,6 +76,8 @@ class SimplePipeTests(unittest.TestCase):
             self.assertEqual(pipes.quote("test%s'name'" % u),
                               '"test\\%s\'name\'"' % u)
 
+        self.assertEqual(pipes.quote(''), "''")
+
     def testRepr(self):
         t = pipes.Template()
         self.assertEqual(repr(t), "<Template instance, steps=[]>")
diff --git a/Misc/ACKS b/Misc/ACKS
index e70db57..3fb65e0 100644
--- a/Misc/ACKS
+++ b/Misc/ACKS
@@ -819,6 +819,7 @@ Dik Winter
 Blake Winton
 Jean-Claude Wippler
 Lars Wirzenius
+John Wiseman
 Chris Withers
 Stefan Witzel
 David Wolever
-- 
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