[ranges] Add missing \exposid (#5796)

Author: hewillk

source/ranges.tex

@@ -7216,7 +7216,7 @@
 \end{itemdescr}
 
 \begin{itemdecl}
-constexpr iterator(@\exposid{Parent}@& parent, iterator_t<@\exposid{Base}@> outer);
+constexpr @\exposid{iterator}@(@\exposid{Parent}@& parent, iterator_t<@\exposid{Base}@> outer);
 \end{itemdecl}
 
 \begin{itemdescr}
@@ -12285,9 +12285,9 @@
       requires @\libconcept{random_access_range}@<@\exposid{Base}@> &&
                @\libconcept{three_way_comparable}@<iterator_t<@\exposid{Base}@>>;
 
-    friend constexpr iterator operator+(const @\exposid{iterator}@& i, difference_type n)
+    friend constexpr @\exposid{iterator}@ operator+(const @\exposid{iterator}@& i, difference_type n)
       requires @\libconcept{random_access_range}@<@\exposid{Base}@>;
-    friend constexpr iterator operator+(difference_type n, const @\exposid{iterator}@& i)
+    friend constexpr @\exposid{iterator}@ operator+(difference_type n, const @\exposid{iterator}@& i)
       requires @\libconcept{random_access_range}@<@\exposid{Base}@>;
     friend constexpr @\exposid{iterator}@ operator-(const @\exposid{iterator}@& i, difference_type n)
       requires @\libconcept{random_access_range}@<@\exposid{Base}@>;
@@ -13036,7 +13036,7 @@
 \end{itemdescr}
 
 \begin{itemdecl}
-constexpr iterator& operator+=(difference_type x)
+constexpr @\exposid{iterator}@& operator+=(difference_type x)
   requires @\libconcept{random_access_range}@<@\exposid{Base}@>;
 \end{itemdecl}