Update p02_printing_to_file.rst

Eskibear · Eskibear · commit da7683f9e3c9 · 2015-05-27T16:42:25.000+08:00
fix code error ( maybe )
diff --git a/source/c05/p02_printing_to_file.rst b/source/c05/p02_printing_to_file.rst
@@ -16,7 +16,7 @@
 
 .. code-block:: python
 
-    with open('somefile.txt', 'rt') as f:
+    with open('somefile.txt', 'wt') as f:
         print('Hello World!', file=f)
 
 ----------
