Rewording

Author: ThomasLandauer

mailer.rst

@@ -325,8 +325,8 @@ header, etc.) but most of the times you'll set text headers::
             // this non-standard header tells compliant autoresponders ("email holiday mode") to not
             // reply to this message because it's an automated email
             ->addTextHeader('X-Auto-Response-Suppress', 'OOF, DR, RN, NRN, AutoReply')
-            // to add multiple  values for an `In-Reply-To` or `References` header
-            // you can pass an array
+            // use an array if you want to add a header with multiple values
+            // (for example in the "References" or "In-Reply-To" header)
             ->addIdHeader('References', ['123@example.com', '456@example.com']);
         // ...
     ;