scripted-diff: Remove trailing whitespaces

-BEGIN VERIFY SCRIPT-

sed --in-place'' --regexp-extended 's/[[:space:]]+$//g' $(git grep -I --files-with-matches --extended-regexp '[[:space:]]+$' -- src test  ':!*.svg' ':!src/crypto/sha256_sse4*' ':!src/leveldb' ':!src/qt/locale' ':!src/secp256k1' ':!src/univalue')

-END VERIFY SCRIPT-

src/qt/macnotificationhandler.mm

@@ -64,7 +64,7 @@ MacNotificationHandler *MacNotificationHandler::instance()
     static MacNotificationHandler *s_instance = nullptr;
     if (!s_instance) {
         s_instance = new MacNotificationHandler();
-        
+
         Class aPossibleClass = objc_getClass("NSBundle");
         if (aPossibleClass) {
             // change NSBundle -bundleIdentifier method to return a correct bundle identifier