[clang-tidy] Concatenate nested namespaces (1/7: components a-c) (#16294)

esphome/components/ade7953_i2c/ade7953_i2c.cpp

@@ -2,8 +2,7 @@
 #include "esphome/core/helpers.h"
 #include "esphome/core/log.h"
 
-namespace esphome {
-namespace ade7953_i2c {
+namespace esphome::ade7953_i2c {
 
 static const char *const TAG = "ade7953";
 
@@ -76,5 +75,4 @@ bool AdE7953I2c::ade_read_32(uint16_t reg, uint32_t *value) {
   return false;
 }
 
-}  // namespace ade7953_i2c
-}  // namespace esphome
+}  // namespace esphome::ade7953_i2c