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/gyro_sender.h b/frc971/wpilib/gyro_sender.h
index 4abfeaa..1c3f5d6 100644
--- a/frc971/wpilib/gyro_sender.h
+++ b/frc971/wpilib/gyro_sender.h
@@ -12,8 +12,7 @@
 #include "frc971/wpilib/gyro_interface.h"
 #include "frc971/zeroing/averager.h"
 
-namespace frc971 {
-namespace wpilib {
+namespace frc971::wpilib {
 
 // Handles reading the gyro over SPI and sending out angles on a queue.
 //
@@ -56,7 +55,6 @@
   bool zeroed_ = false;
 };
 
-}  // namespace wpilib
-}  // namespace frc971
+}  // namespace frc971::wpilib
 
 #endif  // FRC971_WPILIB_GYRO_H_