DOC: tiny update
@@ -125,7 +125,7 @@ facet :class:`Facet` The row and/or column of a general faceted plot :ref
Encoding Data Types
~~~~~~~~~~~~~~~~~~~
The details of any mapping depend on the *type* of the data. Altair recognizes
-four main data types:
+five main data types:
============ ============== ================================================
Data Type Shorthand Code Description
