Update GzipFile docstring to mention gzip.open()'s new text-mode support.
diff --git a/Lib/gzip.py b/Lib/gzip.py
index f6f63bb..8b89426 100644
--- a/Lib/gzip.py
+++ b/Lib/gzip.py
@@ -129,7 +129,7 @@
     the exception of the readinto() and truncate() methods.
 
     This class only supports opening files in binary mode. If you need to open a
-    compressed file in text mode, wrap your GzipFile with an io.TextIOWrapper.
+    compressed file in text mode, use the gzip.open() function.
 
     """