Proposed resolution:

This wording is relative to N4835.

1. Add

   #include <compare>
   

   to the following header synopses:

   1. [coroutine.syn]
   2. [system.error.syn]
   3. [utility.syn]
   4. [tuple.syn]
   5. [optional.syn]
   6. [variant.syn]
   7. [memory.syn]
   8. [type.index.synopsis]
   9. [string.syn]
   10. [string.view.synop]
   11. [array.syn]
   12. [deque.syn]
   13. [forward.list.syn]
   14. [list.syn]
   15. [vector.syn]
   16. [associative.map.syn]
   17. [associative.set.syn]
   18. [unord.map.syn]
   19. [unord.set.syn]
   20. [queue.syn]
   21. [stack.syn]
   22. [iterator.synopsis]
   23. [ranges.syn]
   24. [time.syn]
   25. [fs.filesystem.syn]
   26. [re.syn]
   27. [thread.syn]