Merge pull request #3765 from axilleas/typo

Fixed typo in app/views/deploy_keys/index.html.haml

app/views/deploy_keys/index.html.haml

 = render "projects/settings_nav"
 
 %p.slead
-  Deploy keys allow read-only access to repository. They can be used for for CI, staging or production servers. A deploy key can be added to only one project. If you need to add the same key to multiple projects you can create a deploy user and add that user to multiple projects.
+  Deploy keys allow read-only access to repository. They can be used for CI, staging or production servers. A deploy key can be added to only one project. If you need to add the same key to multiple projects you can create a deploy user and add that user to multiple projects.
 
   - if can? current_user, :admin_project, @project
     = link_to new_project_deploy_key_path(@project), class: "btn btn-small", title: "New Deploy Key" do