Update mailer.rst

Co-Authored-By: Oskar Stark <oskarstark@googlemail.com>

Author: gisostallenberg

mailer.rst

@@ -160,7 +160,6 @@ Multiple addresses are defined with the ``addXXX()`` methods::
 A ``NamedAddress`` can be created from a single string::
 
     $email = (new Email())
-    // ...
         ->from(NamedAddress::fromString('Fabien <fabien@example.com>'))
     // ...
     ;