app/views/users/_form.html.erb
<%= simple_form_for(@user) do |f| %>
<%= f.error_notification %>
<div class="form-inputs">
<%= f.input :email, :required => true, :autofocus => true %>
<%= f.input :password, :autocomplete => "off", :hint => "leave it blank if you don't want to change it", :required => false %>
<%= f.input :password_confirmation, :required => false %>
<%= f.input :current_password, :hint => "we need your current password to confirm your changes", :required => true %>
</div>
<div class="form-actions">
<%= f.button :submit, "Update" %>
</div>
<% end %>