Prevent 500 error if cant detect branches for commit

app/views/projects/commit/_commit_box.html.haml

@@ -39,17 +39,18 @@
   - @commit.parents.each do |parent|
     = link_to parent.id[0...10], project_commit_path(@project, parent)
 
-.commit-info-row
-  %span.cgray
-    Exists in
-  %span
-    - branch = commit_default_branch(@project, @branches)
-    = link_to(branch, project_tree_path(@project, branch))
-    - if @branches.any?
-      and in
-      = link_to("#{pluralize(@branches.count, "other branch")}", "#", class: "js-details-expand")
-      %span.js-details-contain.hide
-        = commit_branches_links(@project, @branches)
+- if @branches.any?
+  .commit-info-row
+    %span.cgray
+      Exists in
+    %span
+      - branch = commit_default_branch(@project, @branches)
+      = link_to(branch, project_tree_path(@project, branch))
+      - if @branches.any?
+        and in
+        = link_to("#{pluralize(@branches.count, "other branch")}", "#", class: "js-details-expand")
+        %span.js-details-contain.hide
+          = commit_branches_links(@project, @branches)
 
 .commit-box
   %h3.commit-title

features/steps/project/project_merge_requests.rb

@@ -109,7 +109,6 @@ class ProjectMergeRequests < Spinach::FeatureSteps
   end
 
   And 'I click on the first commit in the merge request' do
-
     click_link merge_request.commits.first.short_id(8)
   end