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/Lib/distutils/command/sdist.py b/Lib/distutils/command/sdist.py
index 3dfe6f2..eb2db50 100644
--- a/Lib/distutils/command/sdist.py
+++ b/Lib/distutils/command/sdist.py
@@ -333,7 +333,7 @@
 
             try:
                 self.filelist.process_template_line(line)
-            except DistutilsTemplateError, msg:
+            except DistutilsTemplateError as msg:
                 self.warn("%s, line %d: %s" % (template.filename,
                                                template.current_line,
                                                msg))