Update compatibility comments to 2.1, corresponding to PEP 291 1.13.
diff --git a/Lib/distutils/command/install.py b/Lib/distutils/command/install.py
index 2aaf010..fdbec35 100644
--- a/Lib/distutils/command/install.py
+++ b/Lib/distutils/command/install.py
@@ -4,7 +4,7 @@
 
 from distutils import log
 
-# This module should be kept compatible with Python 1.5.2.
+# This module should be kept compatible with Python 2.1.
 
 __revision__ = "$Id$"