Fixup position of punctuation inside quotes

This looks nicer for text in code font.

Author: jwakely

source/utilities.tex

@@ -18535,14 +18535,14 @@
 
 static_assert( is_pointer_interconvertible_with_class( &C::b ) );
   // Succeeds because, despite its appearance, \tcode{\&C::b} has type
-  // "pointer to member of \tcode{B} of type \tcode{int}."
+  // "pointer to member of \tcode{B} of type \tcode{int}".
 static_assert( is_pointer_interconvertible_with_class<C>( &C::b ) );
   // Forces the use of class \tcode{C}, and fails.
 
 static_assert( is_corresponding_member( &C::a, &C::b ) );
   // Succeeds because, despite its appearance, \tcode{\&C::a} and \tcode{\&C::b} have types
   // "pointer to member of \tcode{A} of type \tcode{int}" and
-  // "pointer to member of \tcode{B} of type \tcode{int}," respectively.
+  // "pointer to member of \tcode{B} of type \tcode{int}", respectively.
 static_assert( is_corresponding_member<C, C>( &C::a, &C::b ) );
   // Forces the use of class \tcode{C}, and fails.
 \end{codeblock}