Cleaned up code, to follow the ruby style guidelines

app/mailers/event_mailer.rb

@@ -12,7 +12,8 @@ class EventMailer < ApplicationMailer
                                          subject: event.title}"
   end
 
-# Send email to submitter too. Before, only moderators were receiving emails when an event was updated
+  # Send email to submitter too. Before, only moderators were receiving emails
+  # when an event was updated
   def update(event)
     @event = event
     @current_user = User.find_by id: event.paper_trail.originator

app/mailers/moderationorga_mailer.rb

@@ -58,7 +58,7 @@ class ModerationorgaMailer < ApplicationMailer
 
     mail 'In-Reply-To' =>
       "<orga-#{orga.id}@#{ActionMailer::Base.default_url_options[:host]}>",
-         subject: "#{t 'mail_prefix'}#{t 'moderationorga_mailer.destroy.subject',
-                                         subject: orga.name}"
+         subject: t('mail_prefix') + t('moderationorga_mailer.destroy.subject',
+                                       subject: orga.name)
   end
 end

app/models/event_callbacks.rb

@@ -25,18 +25,18 @@ class EventCallbacks
   end
 
   def self.after_update(event)
+    return unless ActionMailer::Base.default_url_options[:host]
+
     if event.moderated_changed? && event.moderated?
       tweet event
 
-      if ActionMailer::Base.default_url_options[:host]
       # Send an acceptation mail to its author
       EventMailer.accept(event).deliver_now
 
       # Send an acceptation mail to moderators
       ModerationMailer.accept(event).deliver_now
-      end
 
-    elsif ActionMailer::Base.default_url_options[:host]
+    else
       # Send an update mail to moderators
       ModerationMailer.update(event).deliver_now