FIXUP CWG2663: Fix \tcode in examples.

Author: burblebee

source/declarations.tex

@@ -7919,7 +7919,7 @@
 struct D2 : C { };
 
 struct D3 : D1, D2 {
-  using D1::i;                  // OK, equivalent to using \tcode{C::i}
+  using D1::i;                  // OK, equivalent to \tcode{using C::i}
   using D1::i;                  // error: duplicate
   using D2::i;                  // error: duplicate, also names \tcode{C::i}
 };
@@ -8007,7 +8007,7 @@
   using A::h;                           // error: conflicts
   using B::x;
   using A::x;                           // OK, hides \tcode{struct B::x}
-  using A::x;                           // OK, does not conflict with previous using \tcode{A::x}
+  using A::x;                           // OK, does not conflict with previous \tcode{using A::x}
   x = 99;                               // assigns to \tcode{A::x}
   struct x x1;                          // \tcode{x1} has class type \tcode{B::x}
 }