[template.mask.array.overview], [template.indirect.array.overview] fix itemdecl typos

Author: jwakely

source/numerics.tex

@@ -8431,7 +8431,7 @@
 
 \indexlibrarymember{operator[]}{mask_array}%
 \begin{itemdecl}
-mask_array<T> valarray<T>::operator[](const valarray<bool>&).
+mask_array<T> valarray<T>::operator[](const valarray<bool>&);
 \end{itemdecl}
 
 \pnum
@@ -8548,7 +8548,7 @@
 
 \indexlibrarymember{operator[]}{indirect_array}%
 \begin{itemdecl}
-indirect_array<T> valarray<T>::operator[](const valarray<size_t>&).
+indirect_array<T> valarray<T>::operator[](const valarray<size_t>&);
 \end{itemdecl}
 
 \pnum