Fix grammar in Doc/tutorial/controlflow.rst (GH-21885)



Automerge-Triggered-By: @csabella
diff --git a/Doc/tutorial/controlflow.rst b/Doc/tutorial/controlflow.rst
index 5d5b01d..5d24a19 100644
--- a/Doc/tutorial/controlflow.rst
+++ b/Doc/tutorial/controlflow.rst
@@ -661,7 +661,7 @@
         return 'name' in kwds
 
 There is no possible call that will make it return ``True`` as the keyword ``'name'``
-will always to bind to the first parameter. For example::
+will always bind to the first parameter. For example::
 
     >>> foo(1, **{'name': 2})
     Traceback (most recent call last):