Refactor mirror instructions view

app/helpers/mirror_helper.rb

@@ -7,4 +7,8 @@ module MirrorHelper
       project_mirror_endpoint: project_mirror_path(@project, :json)
     }
   end
+
+  def mirror_lfs_sync_message
+    _('The Git LFS objects will <strong>not</strong> be synced.').html_safe
+  end
 end

app/views/projects/mirrors/_instructions.html.haml

@@ -7,7 +7,7 @@
     %li
       - minutes = Gitlab.config.gitlab_shell.git_timeout / 60
       = _("The update action will time out after %{number_of_minutes} minutes. For big repositories, use a clone/push combination.") % { number_of_minutes: minutes }
-    %li= _('The Git LFS objects will <strong>not</strong> be synced.').html_safe
+    %li= mirror_lfs_sync_message
     %li
       = _('This user will be the author of all events in the activity feed that are the result of an update,
       like new branches being created or new commits being pushed to existing branches.')