distinguish between a type and its construction

Author: tshepang

src/ownership-and-deconstruction.rst

@@ -637,8 +637,13 @@ An :dt:`extending expression` is any of the following:
   The :t:`tail expression` of a :t:`block expression` that is an
   :t:`extending expression`.
 
+* :dp:`fls_eeaJtK4w5gVK`
+  The :t:`argument operand` to a :t:`tuple struct call expression`
+  of an extending :t:`tuple struct`.
+
 * :dp:`fls_rT33l0YwUGlK`
-  The :t:`argument operand` to an extending :t:`tuple struct` or :t:`tuple enum variant`.
+  The :t:`argument operand` to a  :t:`tuple struct call expression`
+  of an extending :t:`tuple enum variant`.
 
 :dp:`fls_aq01wjpkxhq9`
 The :t:`drop scope` of the :t:`operand` of a :t:`borrow expression` that is an