Update compatibility comments to 2.1, corresponding to PEP 291 1.13.
diff --git a/Lib/distutils/command/sdist.py b/Lib/distutils/command/sdist.py
index 7021496..fe6c913 100644
--- a/Lib/distutils/command/sdist.py
+++ b/Lib/distutils/command/sdist.py
@@ -2,7 +2,7 @@
 
 Implements the Distutils 'sdist' command (create a source distribution)."""
 
-# This module should be kept compatible with Python 1.5.2.
+# This module should be kept compatible with Python 2.1.
 
 __revision__ = "$Id$"