issue26484 - fix the broken table in the doc about len().
diff --git a/Doc/library/sets.rst b/Doc/library/sets.rst
index a7ae3ab..6c5e183 100644
--- a/Doc/library/sets.rst
+++ b/Doc/library/sets.rst
@@ -76,7 +76,7 @@
+-------------------------------+------------+---------------------------------+
| Operation | Equivalent | Result |
+===============================+============+=================================+
-| ``len(s)`` | | number of elements in set *s*
+| ``len(s)`` | | number of elements in set *s* |
| | | (cardinality) |
+-------------------------------+------------+---------------------------------+
| ``x in s`` | | test *x* for membership in *s* |