More idlelib cleanup inspired by pyflakes.
diff --git a/Lib/idlelib/SearchEngine.py b/Lib/idlelib/SearchEngine.py
index b3b7b4d..2118cd3 100644
--- a/Lib/idlelib/SearchEngine.py
+++ b/Lib/idlelib/SearchEngine.py
@@ -85,7 +85,7 @@
         except re.error as what:
             args = what.args
             msg = args[0]
-            col = arg[1] if len(args) >= 2 else -1
+            col = args[1] if len(args) >= 2 else -1
             self.report_error(pat, msg, col)
             return None
         return prog