Issue #18316: Update idlelib 2.7 except clauses to ease backports.
diff --git a/Lib/idlelib/GrepDialog.py b/Lib/idlelib/GrepDialog.py
index c8b703c..b5e35d7 100644
--- a/Lib/idlelib/GrepDialog.py
+++ b/Lib/idlelib/GrepDialog.py
@@ -98,7 +98,7 @@
     def findfiles(self, dir, base, rec):
         try:
             names = os.listdir(dir or os.curdir)
-        except os.error, msg:
+        except os.error as msg:
             print msg
             return []
         list = []