app/views/devise/passwords/edit.html.erb
<div class="container">
<h1 class="page-title"><%= t('.change_password') %></h1>
<%= form_for(resource, :as => resource_name, :url => password_path(resource_name), :html => { :method => :put, role: 'form' }) do |f| %>
<%= devise_error_messages! %>
<%= f.hidden_field :reset_password_token %>
<fieldset>
<div class="row">
<div class="col-md-12">
<div class="form-group">
<%= f.label :password, "New password", class: 'control-label' %><br />
<%= f.password_field :password, autofocus: true, class: 'form-control' %>
</div>
</div>
</div>
<div class="row">
<div class="col-md-12">
<div class="form-group">
<%= f.label :password_confirmation, "Confirm new password", class: 'control-label' %><br />
<%= f.password_field :password_confirmation, class: 'form-control' %>
</div>
</div>
</div>
<div class="row">
<div class="col-md-12">
<div class="form-group">
<%= f.submit "Change my password", class: 'btn btn-lg btn-primary' %>
</div>
</div>
</div>
</fieldset>
<% end %>