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/pdp_fetcher.h b/frc971/wpilib/pdp_fetcher.h
index 72f6745..38c4a5b 100644
--- a/frc971/wpilib/pdp_fetcher.h
+++ b/frc971/wpilib/pdp_fetcher.h
@@ -12,8 +12,7 @@
 class PowerDistributionPanel;
 }  // namespace frc
 
-namespace frc971 {
-namespace wpilib {
+namespace frc971::wpilib {
 
 // Handles fetching values from the PDP.
 class PDPFetcher {
@@ -32,7 +31,6 @@
   ::std::unique_ptr<::frc::PowerDistributionPanel> pdp_;
 };
 
-}  // namespace wpilib
-}  // namespace frc971
+}  // namespace frc971::wpilib
 
 #endif  // FRC971_WPILIB_PDP_FETCHER_H_