[range.iota.view] Add missing \exposid formatting

Author: jensmaurer

source/ranges.tex

@@ -2694,7 +2694,7 @@
 \begin{itemdescr}
 \pnum
 \effects
-Equivalent to: \tcode{return iterator\{\exposid{value_}\};}
+Equivalent to: \tcode{return \exposid{iterator}\{\exposid{value_}\};}
 \end{itemdescr}
 
 \indexlibrarymember{end}{iota_view}%
@@ -2722,7 +2722,7 @@
 \begin{itemdescr}
 \pnum
 \effects
-Equivalent to: \tcode{return iterator\{bound_\};}
+Equivalent to: \tcode{return \exposid{iterator}\{\exposid{bound_}\};}
 \end{itemdescr}
 
 \indexlibrarymember{size}{iota_view}%