add spdx

Author: caternuson

I2C_Scanners/arduino/i2c_scanner/i2c_scanner.ino

@@ -1,3 +1,6 @@
+// SPDX-FileCopyrightText: 2023 Carter Nelson for Adafruit Industries
+//
+// SPDX-License-Identifier: MIT
 // --------------------------------------
 // i2c_scanner
 //
@@ -26,7 +29,7 @@ void loop() {
   Serial.println("Scanning...");
 
   nDevices = 0;
-  for(address = 1; address < 127; address++ ) 
+  for(address = 1; address < 127; address++ )
   {
     // The i2c_scanner uses the return value of
     // the Write.endTransmisstion to see if
@@ -37,20 +40,20 @@ void loop() {
     if (error == 0)
     {
       Serial.print("I2C device found at address 0x");
-      if (address<16) 
+      if (address<16)
         Serial.print("0");
       Serial.print(address,HEX);
       Serial.println("  !");
 
       nDevices++;
     }
-    else if (error==4) 
+    else if (error==4)
     {
       Serial.print("Unknown error at address 0x");
-      if (address<16) 
+      if (address<16)
         Serial.print("0");
       Serial.println(address,HEX);
-    }    
+    }
   }
   if (nDevices == 0)
     Serial.println("No I2C devices found\n");