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/motors/big/motor_controls.h b/motors/big/motor_controls.h
index 8aae5d1..6644ea4 100644
--- a/motors/big/motor_controls.h
+++ b/motors/big/motor_controls.h
@@ -9,8 +9,7 @@
 #include "motors/math.h"
 #include "motors/motor.h"
 
-namespace frc971 {
-namespace motors {
+namespace frc971::motors {
 
 class MotorControlsImplementation : public MotorControls {
  public:
@@ -67,7 +66,6 @@
   int16_t debug_[9];
 };
 
-}  // namespace motors
-}  // namespace frc971
+}  // namespace frc971::motors
 
 #endif  // MOTORS_MOTOR_CONTROLS_H_