test: Add additional tests for Email class

Author: gr8man

.github/scripts/random-tests-config.txt

@@ -20,7 +20,7 @@ Cookie
 # DataConverter
 # Database
 # Debug
-# Email
+Email
 # Encryption
 # Entity
 Events

system/Email/Email.php

@@ -182,7 +182,7 @@ class Email
      *
      * @see http://www.ietf.org/rfc/rfc822.txt
      *
-     * @var "\r\n"|"n"
+     * @var string
      */
     public $newline = "\r\n";
 
@@ -197,7 +197,7 @@ class Email
      *
      * @see http://www.ietf.org/rfc/rfc822.txt
      *
-     * @var "\n"|"\r\n"
+     * @var string
      */
     public $CRLF = "\r\n";