Added PR number

IanLee1521 · web-flow · commit fc1f88e42aad · 2018-06-03T16:25:10.000-07:00
diff --git a/CHANGES.txt b/CHANGES.txt
@@ -6,7 +6,7 @@ UNRELEASED
 
 Changes:
 
-* Remove support for EOL Python 2.6 and 3.3.
+* Remove support for EOL Python 2.6 and 3.3. PR #720.
 
 2.4.0 (2018-04-10)
 ------------------
