Fix reference problems

Author: steve-downey

papers/P2988/new-optional.tex

@@ -564,7 +564,7 @@
 \begin{itemdescr}
 \pnum
 \effects
-See \tref{optional.assign.copy}.
+See \tcode{optional.assign.copy}.
 \begin{lib2dtab2}{\tcode{optional::operator=(const optional\&)} effects}{optional.assign.copy}
 {\tcode{*this} contains a value}
 {\tcode{*this} does not contain a value}
@@ -615,7 +615,7 @@
 
 \pnum
 \effects
-See \tref{optional.assign.move}.
+See \tcode{optional.assign.move}.
 The result of the expression \tcode{rhs.has_value()} remains unchanged.
 \begin{lib2dtab2}{\tcode{optional::operator=(optional\&\&)} effects}{optional.assign.move}
 {\tcode{*this} contains a value}
@@ -713,7 +713,7 @@
 
 \pnum
 \effects
-See \tref{optional.assign.copy.templ}.
+See \tcode{optional.assign.copy.templ}.
 \begin{lib2dtab2}{\tcode{optional::operator=(const optional<U>\&)} effects}{optional.assign.copy.templ}
 {\tcode{*this} contains a value}
 {\tcode{*this} does not contain a value}
@@ -769,7 +769,7 @@
 
 \pnum
 \effects
-See \tref{optional.assign.refcopy.templ}.
+See \tcode{optional.assign.refcopy.templ}.
 \begin{lib2dtab2}{\tcode{optional::operator=(const optional<U\&>\&)} effects}{optional.assign.refcopy.templ}
 {\tcode{*this} contains a value}
 {\tcode{*this} does not contain a value}
@@ -828,7 +828,7 @@
 
 \pnum
 \effects
-See \tref{optional.assign.move.templ}.
+See \tcode{optional.assign.move.templ}.
 The result of the expression \tcode{rhs.has_value()} remains unchanged.
 \begin{lib2dtab2}{\tcode{optional::operator=(optional<U>\&\&)} effects}{optional.assign.move.templ}
 {\tcode{*this} contains a value}