[DOCUMENTATION] English : UTF-8 might not be appropriate.

git-svn-id: http://framework.zend.com/svn/framework/standard/trunk@19421 44c647ce-9c0f-0410-b52a-842ac1e357ba

documentation/manual/en/module_specs/Zend_Mail-Encoding.xml

@@ -21,7 +21,7 @@
 
     <programlisting language="php"><![CDATA[
 // By default Zend_Mime::ENCODING_QUOTEDPRINTABLE
-$mail = new Zend_Mail('UTF-8');
+$mail = new Zend_Mail();
 
 // Reset to Base64 Encoding.
 $mail->setHeaderEncoding(Zend_Mime::ENCODING_BASE64);