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/aos/testing/flatbuffer_eq.h b/aos/testing/flatbuffer_eq.h
index b560aaa..8a42b5f 100644
--- a/aos/testing/flatbuffer_eq.h
+++ b/aos/testing/flatbuffer_eq.h
@@ -7,8 +7,7 @@
 #include "aos/flatbuffers.h"
 #include "aos/json_to_flatbuffer.h"
 
-namespace aos {
-namespace testing {
+namespace aos::testing {
 
 // Use FlatbufferUnwrapped to instantiate this.
 template <typename T>
@@ -85,7 +84,6 @@
       new FlatbufferEqMatcher(aos::FlatbufferVector<T>(expected))));
 }
 
-}  // namespace testing
-}  // namespace aos
+}  // namespace aos::testing
 
 #endif  // AOS_TESTING_FLATBUFFER_EQ_H_
diff --git a/aos/testing/path.h b/aos/testing/path.h
index 7f4187d..ebe63fe 100644
--- a/aos/testing/path.h
+++ b/aos/testing/path.h
@@ -4,13 +4,11 @@
 #include <string>
 #include <string_view>
 
-namespace aos {
-namespace testing {
+namespace aos::testing {
 
 // Returns the path to the provided artifact which works
 std::string ArtifactPath(std::string_view path);
 
-}  // namespace testing
-}  // namespace aos
+}  // namespace aos::testing
 
 #endif  // AOS_TESTING_PATH_H_
diff --git a/aos/testing/test_logging.h b/aos/testing/test_logging.h
index 5e01879..3671aa1 100644
--- a/aos/testing/test_logging.h
+++ b/aos/testing/test_logging.h
@@ -3,8 +3,7 @@
 
 #include "aos/time/time.h"
 
-namespace aos {
-namespace testing {
+namespace aos::testing {
 
 // Enables the logging framework for use during a gtest test.
 // It will print out all WARNING and above messages all of the time. It will
@@ -23,7 +22,6 @@
 // we want to use graphing tools to verify what's happening.
 void ForcePrintLogsDuringTests();
 
-}  // namespace testing
-}  // namespace aos
+}  // namespace aos::testing
 
 #endif  // AOS_TESTING_TEST_LOGGING_H_
diff --git a/aos/testing/test_shm.h b/aos/testing/test_shm.h
index a1c79ee..658a72d 100644
--- a/aos/testing/test_shm.h
+++ b/aos/testing/test_shm.h
@@ -3,8 +3,7 @@
 
 #include "aos/ipc_lib/shared_mem.h"
 
-namespace aos {
-namespace testing {
+namespace aos::testing {
 
 // Manages creating and cleaning up "shared memory" which works within this
 // process and any that it fork(2)s.
@@ -18,7 +17,6 @@
   struct aos_core global_core_data_;
 };
 
-}  // namespace testing
-}  // namespace aos
+}  // namespace aos::testing
 
 #endif  // AOS_TESTING_TEST_SHM_H_
diff --git a/aos/testing/tmpdir.h b/aos/testing/tmpdir.h
index 8eabf86..bf8e7d7 100644
--- a/aos/testing/tmpdir.h
+++ b/aos/testing/tmpdir.h
@@ -3,8 +3,7 @@
 
 #include <string>
 
-namespace aos {
-namespace testing {
+namespace aos::testing {
 
 // Returns a usable temporary directory.
 std::string TestTmpDir();
@@ -13,7 +12,6 @@
 // otherwise.
 void SetTestShmBase();
 
-}  // namespace testing
-}  // namespace aos
+}  // namespace aos::testing
 
 #endif  // AOS_TESTING_TMPDIR_H_