ply: update PLY to version 3.2
diff --git a/ext/ply/test/lex_token1.py b/ext/ply/test/lex_token1.py
index 380c31c..6fca300 100644
--- a/ext/ply/test/lex_token1.py
+++ b/ext/ply/test/lex_token1.py
@@ -1,9 +1,9 @@
-# lex_token.py
+# lex_token1.py
 #
 # Tests for absence of tokens variable
 
 import sys
-sys.path.insert(0,"..")
+if ".." not in sys.path: sys.path.insert(0,"..")
 
 import ply.lex as lex
 
@@ -14,8 +14,6 @@
 def t_error(t):
     pass
 
-sys.tracebacklimit = 0
-
 lex.lex()