From 46064cb84c579bd1657baffe24f5a515759bff67 Mon Sep 17 00:00:00 2001
From: Andrei Gliga <otzy_007@yahoo.com>
Date: Tue, 10 May 2016 18:50:03 +0300
Subject: [PATCH] << instead of +=

---
 app/helpers/application_settings_helper.rb | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/app/helpers/application_settings_helper.rb b/app/helpers/application_settings_helper.rb
index ced8e16de74..878b1b254ce 100644
--- a/app/helpers/application_settings_helper.rb
+++ b/app/helpers/application_settings_helper.rb
@@ -65,7 +65,7 @@ module ApplicationSettingsHelper
     button_based_providers.map do |source|
       disabled = current_application_settings.disabled_oauth_sign_in_sources.include?(source.to_s)
       css_class = 'btn'
-      css_class += ' active' unless disabled
+      css_class << ' active' unless disabled
       checkbox_name = 'application_setting[enabled_oauth_sign_in_sources][]'
 
       label_tag(checkbox_name, class: css_class) do
-- 
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