Comment out use of reop.expand_escape and reop._expand until their
bugginess has been fixed.
diff --git a/Lib/re.py b/Lib/re.py
index d1df766..5c8827a 100644
--- a/Lib/re.py
+++ b/Lib/re.py
@@ -1504,5 +1504,5 @@
 
 # Replace expand_escape and _expand functions with their C equivalents.
 # If you suspect bugs in the C versions, comment out the next two lines
-expand_escape = reop.expand_escape
-_expand  = reop._expand
+##expand_escape = reop.expand_escape
+##_expand  = reop._expand