Fix module deprecation warnings to have a useful stacklevel
diff --git a/Lib/formatter.py b/Lib/formatter.py
index cc2f4ad..5e8e2ff 100644
--- a/Lib/formatter.py
+++ b/Lib/formatter.py
@@ -21,7 +21,7 @@
 import sys
 import warnings
 warnings.warn('the formatter module is deprecated and will be removed in '
-              'Python 3.6', DeprecationWarning)
+              'Python 3.6', DeprecationWarning, stacklevel=2)
 
 
 AS_IS = None