Fix Atom feeds.

app/views/dashboard/issues.atom.builder

 xml.instruct!
 xml.feed "xmlns" => "http://www.w3.org/2005/Atom", "xmlns:media" => "http://search.yahoo.com/mrss/" do
   xml.title   "#{current_user.name} issues"
-  xml.link    href: issues_dashboard_url(format: :atom, private_token: current_user.private_token), rel: "self", type: "application/atom+xml"
+  xml.link    href: issues_dashboard_url(format: :atom, private_token: current_user.try(:private_token)), rel: "self", type: "application/atom+xml"
   xml.link    href: issues_dashboard_url, rel: "alternate", type: "text/html"
   xml.id      issues_dashboard_url
   xml.updated @issues.first.created_at.strftime("%Y-%m-%dT%H:%M:%SZ") if @issues.any?

app/views/dashboard/show.atom.builder

 xml.instruct!
 xml.feed "xmlns" => "http://www.w3.org/2005/Atom", "xmlns:media" => "http://search.yahoo.com/mrss/" do
   xml.title   "Activity"
-  xml.link    href: dashboard_url(format: :atom, private_token: current_user.private_token), rel: "self", type: "application/atom+xml"
+  xml.link    href: dashboard_url(format: :atom, private_token: current_user.try(:private_token)), rel: "self", type: "application/atom+xml"
   xml.link    href: dashboard_url, rel: "alternate", type: "text/html"
   xml.id      dashboard_url
   xml.updated @events.maximum(:updated_at).strftime("%Y-%m-%dT%H:%M:%SZ") if @events.any?

app/views/events/_event_push.atom.haml

@@ -6,7 +6,7 @@
       %i
         at
         = commit[:timestamp].to_time.to_s(:short)
-    %blockquote= markdown(escape_once(commit[:message]), xhtml: true, reference_only_path: false, project: note.project)
+    %blockquote= markdown(escape_once(commit[:message]), xhtml: true, reference_only_path: false, project: event.project)
   - if event.commits_count > 15
     %p
       %i

app/views/groups/show.atom.builder

 xml.instruct!
 xml.feed "xmlns" => "http://www.w3.org/2005/Atom", "xmlns:media" => "http://search.yahoo.com/mrss/" do
   xml.title   "#{@group.name} activity"
-  xml.link    href: group_url(@group, format: :atom, private_token: current_user.private_token), rel: "self", type: "application/atom+xml"
+  xml.link    href: group_url(@group, format: :atom, private_token: current_user.try(:private_token)), rel: "self", type: "application/atom+xml"
   xml.link    href: group_url(@group), rel: "alternate", type: "text/html"
   xml.id      group_url(@group)
   xml.updated @events.maximum(:updated_at).strftime("%Y-%m-%dT%H:%M:%SZ") if @events.any?

app/views/projects/commits/show.atom.builder

 xml.instruct!
 xml.feed "xmlns" => "http://www.w3.org/2005/Atom", "xmlns:media" => "http://search.yahoo.com/mrss/" do
   xml.title   "#{@project.name}:#{@ref} commits"
-  xml.link    href: namespace_project_commits_url(@project.namespace, @project, @ref, format: :atom, private_token: current_user.private_token), rel: "self", type: "application/atom+xml"
+  xml.link    href: namespace_project_commits_url(@project.namespace, @project, @ref, format: :atom, private_token: current_user.try(:private_token)), rel: "self", type: "application/atom+xml"
   xml.link    href: namespace_project_commits_url(@project.namespace, @project, @ref), rel: "alternate", type: "text/html"
   xml.id      namespace_project_commits_url(@project.namespace, @project, @ref)
   xml.updated @commits.first.committed_date.strftime("%Y-%m-%dT%H:%M:%SZ") if @commits.any?

app/views/projects/issues/index.atom.builder

 xml.instruct!
 xml.feed "xmlns" => "http://www.w3.org/2005/Atom", "xmlns:media" => "http://search.yahoo.com/mrss/" do
   xml.title   "#{@project.name} issues"
-  xml.link    href: namespace_project_issues_url(@project.namespace, @project, format: :atom, private_token: current_user.private_token), rel: "self", type: "application/atom+xml"
+  xml.link    href: namespace_project_issues_url(@project.namespace, @project, format: :atom, private_token: current_user.try(:private_token)), rel: "self", type: "application/atom+xml"
   xml.link    href: namespace_project_issues_url(@project.namespace, @project), rel: "alternate", type: "text/html"
   xml.id      namespace_project_issues_url(@project.namespace, @project)
   xml.updated @issues.first.created_at.strftime("%Y-%m-%dT%H:%M:%SZ") if @issues.any?

app/views/projects/show.atom.builder

 xml.instruct!
 xml.feed "xmlns" => "http://www.w3.org/2005/Atom", "xmlns:media" => "http://search.yahoo.com/mrss/" do
   xml.title   "#{@project.name} activity"
-  xml.link    href: namespace_project_url(@project.namespace, @project, format: :atom, private_token: current_user.private_token), rel: "self", type: "application/atom+xml"
+  xml.link    href: namespace_project_url(@project.namespace, @project, format: :atom, private_token: current_user.try(:private_token)), rel: "self", type: "application/atom+xml"
   xml.link    href: namespace_project_url(@project.namespace, @project), rel: "alternate", type: "text/html"
   xml.id      namespace_project_url(@project.namespace, @project)
   xml.updated @events.maximum(:updated_at).strftime("%Y-%m-%dT%H:%M:%SZ") if @events.any?