Nest some more namespaces

Did someone previously suggest that all namespace had been
nested?  Silly.

Signed-off-by: Stephan Pleines <pleines.stephan@gmail.com>
Change-Id: I22278c1caaeba8b47dc46fb2ed3078c20a11e190
diff --git a/frc971/wpilib/loop_output_handler.h b/frc971/wpilib/loop_output_handler.h
index 5f66a4c..1fb46b2 100644
--- a/frc971/wpilib/loop_output_handler.h
+++ b/frc971/wpilib/loop_output_handler.h
@@ -9,8 +9,7 @@
 #include "aos/time/time.h"
 #include "aos/util/log_interval.h"
 
-namespace frc971 {
-namespace wpilib {
+namespace frc971::wpilib {
 
 // Handles sending the output from a single control loop to the hardware.
 //
@@ -64,7 +63,6 @@
   ::aos::TimerHandler *timer_handler_;
 };
 
-}  // namespace wpilib
-}  // namespace frc971
+}  // namespace frc971::wpilib
 
 #endif  // FRC971_WPILIB_LOOP_OUTPUT_HANDLER_H_