Fix some mistakes- Issue3243 (r87399)  Correcting the operator precendence
problem with Content-Length header and uncommenting the test.
diff --git a/Lib/http/client.py b/Lib/http/client.py
index 8d62aa5..bb9fa9b 100644
--- a/Lib/http/client.py
+++ b/Lib/http/client.py
@@ -775,7 +775,7 @@
                 for d in data:
                     self.sock.sendall(d)
             else:
-                raise TypeError("data should be byte-like object\
+                raise TypeError("data should be a bytes-like object\
                         or an iterable, got %r " % type(it))
 
     def _output(self, s):