DOC add missing trailing colon (#25542)

changyaochen · web-flow · commit c7024463bf31 · 2023-02-04T19:44:22.000Z
diff --git a/doc/modules/preprocessing.rst b/doc/modules/preprocessing.rst
@@ -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::
 
