Merge pull request #338 from matiu/bug/snippet

fix snippet

lib/TransactionBuilder.js

@@ -1,4 +1,6 @@
-
+// TransactionBuilder
+// ==================
+//
 // Creates a bitcore Transaction object
 //
 //
@@ -33,7 +35,7 @@
 //     broadcast(tx.serialize());
 //
 //     //Searialize it and pass it around...
-//     var string = JSON.serialize(builder.toObj()); 
+//     var string = JSON.stringify(builder.toObj()); 
 //     // then...
 //     var builder = TransactionBuilder.fromObj(JSON.parse(str); 
 //     builder.sign(keys);