[clang-tidy] Concatenate nested namespaces (3/7: components i-m) (#16297)

esphome/components/mopeka_std_check/mopeka_std_check.cpp

@@ -5,8 +5,7 @@
 
 #ifdef USE_ESP32
 
-namespace esphome {
-namespace mopeka_std_check {
+namespace esphome::mopeka_std_check {
 
 static const char *const TAG = "mopeka_std_check";
 static const uint16_t SERVICE_UUID = 0xADA0;
@@ -232,7 +231,6 @@ int8_t MopekaStdCheck::parse_temperature_(const mopeka_std_package *message) {
   }
 }
 
-}  // namespace mopeka_std_check
-}  // namespace esphome
+}  // namespace esphome::mopeka_std_check
 
 #endif