Set correct RFC number.

diff --git a/Lib/quopri.py b/Lib/quopri.py
index 55608d12061bbea7c5c03d8c2b7f60b96a2b7a4e..47ef7512c4b541fb7c841b72ad6e2fdb25ddfafc 100755 (executable)
--- a/Lib/quopri.py
+++ b/Lib/quopri.py
@@ -1,4 +1,4 @@
-# Conversions to/from quoted-printable transport encoding as per RFC-XXXX
+# Conversions to/from quoted-printable transport encoding as per RFC-1521
 # (Dec 1991 version).
 
 ESCAPE = '='