tlv: require shortest encoding for VAR-NUMBER

refs #4946

Change-Id: If106e6461f7a0b518969db33d9f761a1e20f7d91
diff --git a/types.rst b/types.rst
index 608b16e..fc63fbf 100644
--- a/types.rst
+++ b/types.rst
@@ -84,7 +84,7 @@
 
 .. note::
    ABNF grammar of this specification denotes TLV-TYPE of element X as ``X-TYPE``.
-   For example, ``INTEREST-TYPE`` means ``%x05``, the TLV-TYPE of ``Interest`` encoded as ``VAR-NUMBER``.
+   For example, ``INTEREST-TYPE`` means ``%x05``, the TLV-TYPE of ``Interest`` encoded in VAR-NUMBER-1 format.
 
 .. _type reservations: