Fix style

Author: earlephilhower

cores/esp8266/HardwareSerial.cpp

@@ -174,7 +174,9 @@ HardwareSerial Serial(UART0);
 // Executed at end of loop() processing when > 0 bytes available in the Serial port
 void serialEventRun(void)
 {
-  if (serialEvent && Serial.available()) serialEvent();
+  if (serialEvent && Serial.available()) {
+    serialEvent();
+  }
 }
 #endif
 #if !defined(NO_GLOBAL_INSTANCES) && !defined(NO_GLOBAL_SERIAL1)

cores/esp8266/core_esp8266_main.cpp

@@ -195,7 +195,9 @@ static void loop_wrapper() {
     }
     loop();
     loop_end();
-    if (serialEventRun) serialEventRun();
+    if (serialEventRun) {
+        serialEventRun();
+    }
     esp_schedule();
 }