Issue #16341: convert examples to use except ... as ... syntax.
diff --git a/Doc/library/xdrlib.rst b/Doc/library/xdrlib.rst
index e56650c..6f05306 100644
--- a/Doc/library/xdrlib.rst
+++ b/Doc/library/xdrlib.rst
@@ -274,6 +274,5 @@
    p = xdrlib.Packer()
    try:
        p.pack_double(8.01)
-   except xdrlib.ConversionError, instance:
+   except xdrlib.ConversionError as instance:
        print 'packing the double failed:', instance.msg
-