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/control_loops/drivetrain/drivetrain_uc.q.h b/frc971/control_loops/drivetrain/drivetrain_uc.q.h
index 95a2000..5b0bb83 100644
--- a/frc971/control_loops/drivetrain/drivetrain_uc.q.h
+++ b/frc971/control_loops/drivetrain/drivetrain_uc.q.h
@@ -4,8 +4,7 @@
 
 #include "aos/macros.h"
 
-namespace frc971 {
-namespace control_loops {
+namespace frc971::control_loops {
 
 struct GearLogging {
   GearLogging();
@@ -111,7 +110,6 @@
   DrivetrainQueue_Status status;
 };
 
-}  // namespace control_loops
-}  // namespace frc971
+}  // namespace frc971::control_loops
 
 #endif  // FRC971_CONTROL_LOOPS_DRIVETRAIN_DRIVETRAIN_Q_H_