diff -r de7a35bb3306 -r fdbb731d5565 ext/ply/ply/yacc.py
--- a/ext/ply/ply/yacc.py	Wed Apr 23 13:05:50 2014 +0100
+++ b/ext/ply/ply/yacc.py	Wed Mar 19 19:18:43 2014 -0500
@@ -68,7 +68,7 @@
 # Change these to modify the default behavior of yacc (if you wish)
 #-----------------------------------------------------------------------------
 
-yaccdebug   = 1                # Debugging mode.  If set, yacc generates a
+yaccdebug   = 0                # Debugging mode.  If set, yacc generates a
                                # a 'parser.out' file in the current directory
 
 debug_file  = 'parser.out'     # Default name of the debugging file