estored the Address::fromString() example

Author: javiereguiluz

mailer.rst

@@ -151,6 +151,10 @@ both strings or address objects::
         // (email clients will display the name)
         ->from(new NamedAddress('[email protected]', 'Fabien'))
 
+        // defining the email address and name as a string
+        // (the format must match: 'Name <[email protected]>')
+        ->from(Address::fromString('Fabien Potencier <[email protected]>'))
+
         // ...
     ;