Updated all comments for while (!Serial) additions to serial-based examples

libraries/SD/examples/DumpFile/DumpFile.ino

@@ -13,7 +13,7 @@
  
  created  22 December 2010
  by Limor Fried
- modified 2 Apr 2012
+ modified 9 Apr 2012
  by Tom Igoe
  
  This example code is in the public domain.
@@ -32,9 +32,10 @@ void setup()
 {
  // Open serial communications and wait for port to open:
   Serial.begin(9600);
-  // this check is only needed on the Leonardo:
-  while (!Serial) ;
- ;
+   while (!Serial) {
+    ; // wait for serial port to connect. Needed for Leonardo only
+  }
+
 
   Serial.print("Initializing SD card...");
   // make sure that the default chip select pin is set to