From d78272a13b50e912b1ac946da8eec2e75bc6eb41 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?R=C3=A9my=20Coutable?= <remy@rymai.me>
Date: Mon, 10 Dec 2018 13:59:17 +0100
Subject: Fix a frozen string error in app/mailers/notify.rb
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Signed-off-by: Rémy Coutable <remy@rymai.me>
---
 app/mailers/notify.rb | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'app/mailers/notify.rb')

diff --git a/app/mailers/notify.rb b/app/mailers/notify.rb
index 662f3e00047..88ad4c3e893 100644
--- a/app/mailers/notify.rb
+++ b/app/mailers/notify.rb
@@ -166,7 +166,7 @@ class Notify < BaseMailer
     headers['In-Reply-To'] = message_id(model)
     headers['References'] = [message_id(model)]
 
-    headers[:subject]&.prepend('Re: ')
+    headers[:subject] = "Re: #{headers[:subject]}" if headers[:subject]
 
     mail_thread(model, headers)
   end
-- 
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