DOC add missing trailing colon
@@ -685,7 +685,7 @@ be encoded as all zeros::
All the categories in `X_test` are unknown during transform and will be mapped
to all zeros. This means that unknown categories will have the same mapping as
-the dropped category. :meth`OneHotEncoder.inverse_transform` will map all zeros
+the dropped category. :meth:`OneHotEncoder.inverse_transform` will map all zeros
to the dropped category if a category is dropped and `None` if a category is
not dropped::
