tap/app/views/devise/registrations/edit.html.erb

<h2>Edit <%= resource_name.to_s.humanize %></h2>

<%= form_for(resource, :as => resource_name, :url => registration_path(resource_name), :html => { :method => :put }) do |f| %>
  <%= devise_error_messages! %>

  <% if devise_mapping.confirmable? && resource.pending_reconfirmation? %>
    <div>Currently waiting confirmation for: <%= resource.unconfirmed_email %></div>
  <% end %>

  <%= form_password_field f, :password %>
  <%= form_password_field f, :password_confirmation %>

  <%= form_password_field f, :current_password %>

  <%= f.label :avatar %>
  <%= f.file_field :avatar %>

  <%= f.submit "Update", class: 'btn btn-primary' %>
<% end %>