#can_unsubscribe? -> #?unsubscribable?

app/controllers/sent_notifications_controller.rb

@@ -3,7 +3,7 @@ class SentNotificationsController < ApplicationController
   def unsubscribe
     @sent_notification = SentNotification.for(params[:id])
-    return render_404 unless @sent_notification && @sent_notification.can_unsubscribe?
+    return render_404 unless @sent_notification && @sent_notification.unsubscribable?
     noteable = @sent_notification.noteable
     noteable.unsubscribe(@sent_notification.recipient)

app/models/sent_notification.rb

@@ -62,7 +62,7 @@ class SentNotification < ActiveRecord::Base
     end
   end
-  def can_unsubscribe?
+  def unsubscribable?
     !for_commit?
   end

app/views/layouts/notify.html.haml

@@ -45,7 +45,7 @@
           -# Don't link the host is the line below, one link in the email is easier to quickly click than two.
           You're receiving this email because of your account on #{Gitlab.config.gitlab.host}.
           If you'd like to receive fewer emails, you can
-          - if @sent_notification && @sent_notification.can_unsubscribe?
+          - if @sent_notification && @sent_notification.unsubscribable?
             = link_to "unsubscribe", unsubscribe_sent_notification_url(@sent_notification)
             from this thread or
           adjust your notification settings.