Corretions and refinements to the String examples

build/linux/work/examples/08.Strings/CharacterAnalysis/CharacterAnalysis.ino

@@ -15,8 +15,9 @@ 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 fo Leonardo only
+  }
 
   // send an intro:
   Serial.println("send any byte and I'll tell you everything I can about it");
@@ -81,4 +82,3 @@ void loop() {
     Serial.println();
   }
 }
-