[pairs.spec,tuple.creation] Simplify description

by inlining unwrap_ref_decay_t into its point of use.

Author: jensmaurer

source/utilities.tex

@@ -854,10 +854,12 @@
 \end{itemdecl}
 
 \begin{itemdescr}
-Let \tcode{Vi} be \tcode{unwrap_ref_decay_t<Ti>}.
-
 \pnum
-\returns \tcode{pair<V1, V2>(std::forward<T1>(x), std::forward<T2>(y))}.
+\returns
+\begin{codeblock}
+pair<unwrap_ref_decay_t<T1>,
+     unwrap_ref_decay_t<T2>>(std::forward<T1>(x), std::forward<T2>(y))
+\end{codeblock}
 \end{itemdescr}
 
 \pnum
@@ -1599,10 +1601,7 @@
 
 \begin{itemdescr}
 \pnum
-Let \tcode{VTypes...} be \tcode{unwrap_ref_decay_t<TTypes>...}.
-
-\pnum
-\returns \tcode{tuple<VTypes...>(std::forward<TTypes>(t)...)}.
+\returns \tcode{tuple<unwrap_ref_decay_t<TTypes>...>(std::forward<TTypes>(t)...)}.
 
 \pnum
 \begin{example}