SF patch 1631942 by Collin Winter:
(a) "except E, V" -> "except E as V"
(b) V is now limited to a simple name (local variable)
(c) V is now deleted at the end of the except block
diff --git a/Demo/scripts/update.py b/Demo/scripts/update.py
index eac1a22..a965e4a 100755
--- a/Demo/scripts/update.py
+++ b/Demo/scripts/update.py
@@ -19,7 +19,7 @@
         self.changed = 0
         try:
             self.lines = open(filename, 'r').readlines()
-        except IOError, msg:
+        except IOError as msg:
             print '*** Can\'t open "%s":' % filename, msg
             self.lines = None
             return
@@ -32,7 +32,7 @@
         try:
             os.rename(self.filename, self.filename + '~')
             fp = open(self.filename, 'w')
-        except (os.error, IOError), msg:
+        except (os.error, IOError) as msg:
             print '*** Can\'t rewrite "%s":' % self.filename, msg
             return
         print 'writing', self.filename
@@ -67,7 +67,7 @@
     if sys.argv[1:]:
         try:
             fp = open(sys.argv[1], 'r')
-        except IOError, msg:
+        except IOError as msg:
             print 'Can\'t open "%s":' % sys.argv[1], msg
             sys.exit(1)
     else: