libblkid.txt: Clarify documentation file

diff --git a/doc/ChangeLog b/doc/ChangeLog
index b89a0a3..ee1fc83 100644
--- a/doc/ChangeLog
+++ b/doc/ChangeLog
@@ -1,3 +1,7 @@
+2003-07-21  Theodore Ts'o  <tytso@mit.edu>
+
+	* libblkid.txt: Clarify documentation file
+
 2003-04-21  Theodore Ts'o  <tytso@mit.edu>
 
 	* Release of E2fsprogs 1.33