app/views/devise/passwords/edit.html.erb
<div class="page-header">
<h1><%= t('.change_your_password', :default => 'Change your password') %></h1>
</div>
<%= form_for(resource, :as => resource_name, :url => password_path(resource_name), :html => { :method => :put }) do |f| %>
<%= devise_error_messages! %>
<%= f.hidden_field :reset_password_token %>
<div><%= f.label :password, t('.new_password', :default => 'New password') %><br />
<%= f.password_field :password, :autofocus => true %></div>
<div><%= f.label :password_confirmation, t('.confirm_new_password', :default => 'Confirm new password') %><br />
<%= f.password_field :password_confirmation %></div>
<div><%= f.submit t('.change_my_password', :default => 'Change my password'), class: 'btn btn-warning' %></div>
<% end %>
<%= render "devise/shared/links" %>