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/shooter_interpolation/interpolation.h b/frc971/shooter_interpolation/interpolation.h
index bce532f..26b141f 100644
--- a/frc971/shooter_interpolation/interpolation.h
+++ b/frc971/shooter_interpolation/interpolation.h
@@ -5,8 +5,7 @@
 #include <utility>
 #include <vector>
 
-namespace frc971 {
-namespace shooter_interpolation {
+namespace frc971::shooter_interpolation {
 
 double Blend(double coefficient, double a1, double a2);
 
@@ -79,7 +78,6 @@
   }
 }
 
-}  // namespace shooter_interpolation
-}  // namespace frc971
+}  // namespace frc971::shooter_interpolation
 
 #endif  // FRC971_SHOOTER_INTERPOLATION_INTERPOLATION_H_