[iterator.synopsis, template.bitset] Add missing whitespace. (#1673)

Author: Eelis

source/iterators.tex

@@ -745,7 +745,7 @@
   template <class Iterator1, class Iterator2>
     constexpr auto operator-(
       const reverse_iterator<Iterator1>& x,
-      const reverse_iterator<Iterator2>& y) ->decltype(y.base() - x.base());
+      const reverse_iterator<Iterator2>& y) -> decltype(y.base() - x.base());
   template <class Iterator>
     constexpr reverse_iterator<Iterator>
       operator+(

source/utilities.tex

@@ -6182,7 +6182,7 @@
 
 \pnum
 The class template
-\tcode{bitset<N>}%
+\tcode{bitset<N>}
 describes an object that can store a sequence consisting of a fixed number of
 bits, \tcode{N}.