Apply PR #10411 review suggestions

Author: gr8man

system/Email/Email.php

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

tests/system/Email/EmailTest.php

@@ -33,6 +33,8 @@ final class EmailTest extends CIUnitTestCase
 
     protected function tearDown(): void
     {
+        parent::tearDown();
+
         global $mockMailCalled, $mockMailArgs, $mockMailException;
         global $mockPopenCalled, $mockPopenArgs, $mockPopenResult;
         global $mockPcloseStatus;