Fix and add more links.
diff --git a/Doc/tutorial/introduction.rst b/Doc/tutorial/introduction.rst
index b6d94ac..c07a668 100644
--- a/Doc/tutorial/introduction.rst
+++ b/Doc/tutorial/introduction.rst
@@ -390,7 +390,7 @@
 
 .. seealso::
 
-   :ref:`typesseq`
+   :ref:`textseq`
       Strings are examples of *sequence types*, and support the common
       operations supported by such types.