message: docs(aio): update punctuation mark added in TOOLS guide
diff: @@ -37,7 +37,7 @@ ng.profiler.timeChangeDetection();
  ### Change detection profiler
  If your application is janky (it misses frames) or is slow according to other
  -metrics it is important to find the root cause of the issue. Change detection
  +metrics, it is important to find the root cause of the issue. Change detection
  is a phase in Angular's lifecycle that detects changes in values that are
  bound to UI, and if it finds a change it performs the corresponding UI update.
  However, sometimes it is hard to tell if the slowness is due to the act of
  