replace right with pull-right

app/views/tree/_head.html.haml

@@ -3,5 +3,5 @@
     = render partial: 'shared/ref_switcher', locals: {destination: 'tree', path: @path}
   = nav_link(controller: :tree) do
     = link_to 'Source', project_tree_path(@project, @ref)
-  %li.right
+  %li.pull-right
     = render "shared/clone_panel"

app/views/tree/_tree.html.haml

@@ -24,7 +24,7 @@
           %th Name
           %th Last Update
           %th Last Commit
-          %th= link_to "history", project_commits_path(@project, @id), class: "btn btn-tiny right"
+          %th= link_to "history", project_commits_path(@project, @id), class: "btn btn-tiny pull-right"
 
       - if tree.up_dir?
         %tr.tree-item