Fix some mistakes- Issue3243 (r87399)  Correcting the operator precendence
problem with Content-Length header and uncommenting the test.
diff --git a/Lib/urllib/request.py b/Lib/urllib/request.py
index a88bc99..4436105 100644
--- a/Lib/urllib/request.py
+++ b/Lib/urllib/request.py
@@ -1062,7 +1062,7 @@
                                 data))
                 else:
                     request.add_unredirected_header(
-                            'Content-length', '%d' % len(mv) * mv.itemsize)
+                            'Content-length', '%d' % (len(mv) * mv.itemsize))
 
         sel_host = host
         if request.has_proxy():