[Python-checkins] python/dist/src/Lib difflib.py,1.20,1.21

[bcannon at users.sourceforge.net]

Update of /cvsroot/python/python/dist/src/Lib
In directory sc8-pr-cvs1.sourceforge.net:/tmp/cvs-serv26258/Lib

Modified Files:
	difflib.py 
Log Message:
SequenceMatcher(None, [], []).get_grouped_opcodes() now returns a generator
that behaves as if both lists has an empty string in each of them.

Closes bug #979794 (and duplicate bug #980117).


Index: difflib.py
===================================================================
RCS file: /cvsroot/python/python/dist/src/Lib/difflib.py,v
retrieving revision 1.20
retrieving revision 1.21
diff -C2 -d -r1.20 -r1.21
*** difflib.py	15 Jun 2004 23:53:34 -0000	1.20
--- difflib.py	10 Jul 2004 23:54:07 -0000	1.21
***************
*** 573,576 ****
--- 573,578 ----
  
          codes = self.get_opcodes()
+         if not codes:
+             codes = [("equal", 0, 1, 0, 1)]
          # Fixup leading and trailing groups if they show no changes.
          if codes[0][0] == 'equal':