[9.x] Early return when message format is the default

[erikn69]

Avoid going through all the arrays and replacing the strings with the same when the format is the default :message

After 1e02bc - "summarization" feature all method is always called when validator fails

-parent::__construct('The given data was invalid.');
+parent::__construct(static::summarize($validator));

framework/src/Illuminate/Support/MessageBag.php

Lines 261 to 269 in 904bf56

	protected function transform($messages, $format, $messageKey)
	{
	return collect((array) $messages)
	->map(function ($message) use ($format, $messageKey) {
	// We will simply spin through the given messages and transform each one
	// replacing the :message place holder with the real message allowing
	// the messages to be easily formatted to each developer's desires.
	return str_replace([':message', ':key'], [$message, $messageKey], $format);
	})->all();