Fixed whitespace violations

Author: Graham Wharton

lib/internal/Magento/Framework/Mail/Template/TransportBuilder.php

@@ -181,7 +181,7 @@ public function setReplyTo($email, $name = null)
      * new function setFromByStore introduced to allow setting of from address
      * based on store.
      * @see setFromByStore()
-     * 
+     *
      * @param string|array $from
      * @return $this
      */