Resolve code formatting and style issues.

Author: dok-net

README.md

@@ -116,27 +116,24 @@ its valid. For example:
 ```
 #include <SoftwareSerial.h>
 
-#define MYPORT_TX	12
-#define MYPORT_RX	13
+#define MYPORT_TX 12
+#define MYPORT_RX 13
 
 SoftwareSerial myPort;
 
+[...]
 
-....
-
-
-Serial.begin(115200);		// Standard hardware serial port
+Serial.begin(115200); // Standard hardware serial port
 
 myPort.begin(38400, SWSERIAL_8N1, MYPORT_RX, MYPORT_TX, false);
-if (!myPort) {			// If the object did not initilaise, then its configuration is invalid
+if (!myPort) { // If the object did not initialize, then its configuration is invalid
   Serial.println("Invalid SoftwareSerial pin configuration, check config"); 
-  while (1) {			// Can't continue with invalid configuration
-	yield();
-	delay (1000);
+  while (1) { // Don't continue with invalid configuration
+    delay (1000);
   }
 } 
 
-....
+[...]
 ```
 
 ## Using and updating EspSoftwareSerial in the esp8266com/esp8266 Arduino build environment

src/SoftwareSerial.cpp

@@ -49,31 +49,26 @@ SoftwareSerial::~SoftwareSerial() {
 bool SoftwareSerial::isValidGPIOpin(int8_t pin) {
 #if defined(ESP8266)
     return (pin >= 0 && pin <= 16) && !isFlashInterfacePin(pin);
-
 #elif defined(ESP32)
-  // Remove the strapping pins as defined in the datasheets, they affect bootup and other critical operations
-  // Remmove the flash memory pins on related devices, since using these causes memory access issues.
-  #ifdef CONFIG_IDF_TARGET_ESP32
+    // Remove the strapping pins as defined in the datasheets, they affect bootup and other critical operations
+    // Remmove the flash memory pins on related devices, since using these causes memory access issues.
+#ifdef CONFIG_IDF_TARGET_ESP32
     // Datasheet https://www.espressif.com/sites/default/files/documentation/esp32_datasheet_en.pdf,
     // Pinout    https://docs.espressif.com/projects/esp-idf/en/latest/esp32/_images/esp32-devkitC-v4-pinout.jpg    
-	return (pin >= 1  && pin <= 1)  || (pin >= 3  && pin <= 4)  || (pin >= 13 && pin <= 14) ||
-		   (pin >= 16 && pin <= 19) || (pin >= 21 && pin <= 23) || (pin >= 25 && pin <= 27) || 
-		   (pin >= 32 && pin <= 39);
-
-  #elif CONFIG_IDF_TARGET_ESP32S2
+    return (pin == 1) || (pin >= 3 && pin <= 4) || (pin >= 13 && pin <= 14) ||
+        (pin >= 16 && pin <= 19) || (pin >= 21 && pin <= 23) || (pin >= 25 && pin <= 27) || 
+        (pin >= 32 && pin <= 39);
+#elif CONFIG_IDF_TARGET_ESP32S2
     // Datasheet https://www.espressif.com/sites/default/files/documentation/esp32-s2_datasheet_en.pdf,
     // Pinout    https://docs.espressif.com/projects/esp-idf/en/latest/esp32s2/_images/esp32-s2_saola1-pinout.jpg
     return (pin >= 1 && pin <= 21) || (pin >= 33 && pin <= 44);
-  
-  #elif CONFIG_IDF_TARGET_ESP32C3
-	// Datasheet https://www.espressif.com/sites/default/files/documentation/esp32-c3_datasheet_en.pdf, 
-	// Pinout    https://docs.espressif.com/projects/esp-idf/en/latest/esp32c3/_images/esp32-c3-devkitm-1-v1-pinout.jpg
+#elif CONFIG_IDF_TARGET_ESP32C3
+    // Datasheet https://www.espressif.com/sites/default/files/documentation/esp32-c3_datasheet_en.pdf, 
+    // Pinout    https://docs.espressif.com/projects/esp-idf/en/latest/esp32c3/_images/esp32-c3-devkitm-1-v1-pinout.jpg
     return (pin >= 0 && pin <= 1) || (pin >= 3 && pin <= 7) || (pin >= 18 && pin <= 21);
-  
-  #else 
+#else 
     return true;
-  #endif
-	
+#endif
 #else
     return true;
 #endif
@@ -90,16 +85,13 @@ bool SoftwareSerial::isValidRxGPIOpin(int8_t pin) {
 bool SoftwareSerial::isValidTxGPIOpin(int8_t pin) {
     return isValidGPIOpin(pin)
 #if defined(ESP32)
-	#ifdef CONFIG_IDF_TARGET_ESP32
-        && (pin < 34)		// GPIO34 and above are input only, so cannot transmit	
-    
-	#elif CONFIG_IDF_TARGET_ESP32S2
-        && (pin < 46)       // GPIO46 is an input only, so cannot transmit 
-	
-	#elif CONFIG_IDF_TARGET_ESP32C3
-		// Nothing to do
-	#endif
-
+#ifdef CONFIG_IDF_TARGET_ESP32
+        && (pin < 34) // GPIO34 and above are input only
+#elif CONFIG_IDF_TARGET_ESP32S2
+        && (pin <= 45) // GPIO46 is input only 
+#elif CONFIG_IDF_TARGET_ESP32C3
+        // they are all input and output
+#endif
 #endif
         ;
 }