Corrected comments in String examples.

build/shared/examples/8.Strings/StringComparisonOperators/StringComparisonOperators.pde

@@ -15,7 +15,7 @@ void setup() {
   Serial.begin(9600);
   stringOne = String("this");
   stringTwo = String("that");
-  Serial.println("\n\nAdding strings together (concatenation):");
+  Serial.println("\n\nComparing Strings:");
 
 }
 

build/shared/examples/8.Strings/StringSubstring/StringSubstring.pde

@@ -15,7 +15,7 @@ void setup() {
 }
 
 void loop() {
-  // startsWith() checks to see if a String starts with a particular substring:
+  // Set up a String:
   String stringOne = "Content-Type: text/html";
   Serial.println(stringOne);