Merge pull request #515 from AaronBallman/master

[time.clock.system] Align declarations

Author: jwakely

source/utilities.tex

@@ -12009,11 +12009,11 @@
 \begin{codeblock}
 class system_clock {
 public:
-  typedef @\seebelow@                           rep;
-  typedef ratio<@\unspec@, @\unspec@>   period;
+  typedef @\seebelow@                          rep;
+  typedef ratio<@\unspec@, @\unspec@>  period;
   typedef chrono::duration<rep, period>       duration;
   typedef chrono::time_point<system_clock>    time_point;
-  static constexpr bool is_steady =        @\unspec;@
+  static constexpr bool is_steady =           @\unspec;@
 
   static time_point now() noexcept;