Sendmail bug

[ErisDS]

This one has been reported & fixed at least twice on the forum, here's one:

https://en.ghost.org/forum/using-ghost/263-bug-stray-n-character-when-auto-detecting-sendmail

[ErisDS]

FYI - the fix from the forum was

- resolve(stdout.toString()); 
+ resolve(stdout.toString().slice(0, -1));

Via email, someone else suggested:

diff --git a/core/server/mail.js b/core/server/mail.js
index 541e173..16c3b57 100644
--- a/core/server/mail.js
+++ b/core/server/mail.js
@@ -51,7 +51,7 @@ GhostMailer.prototype.detectSendmail = function () {
             if (err && !/bin\/sendmail/.test(stdout)) {
                 return reject();
             }
-            resolve(stdout.toString());
+            resolve(stdout.toString().replace(/(\n|\r|\r\n)$/, ''));
         });
     });
 };

Not sure whether we need one or both.