app/views/devise/passwords/edit.html.erb
<div class="container">
<div class="row justify-content-md-center">
<div class="col-md-6 mt-2rem mb-2rem">
<h2 class="text-center mt-2 mb-2rem">
Change your password
</h2>
<%= 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 class="form-group mt-4">
<%= f.label :password, "New password" %><br />
<% if @minimum_password_length %>
<em>(<%= @minimum_password_length %> characters minimum)</em><br />
<% end %>
<%= f.password_field :password, autofocus: true,
autocomplete: "off",
class: "form-control" %>
</div>
<div class="form-group">
<%= f.label :password_confirmation, "Confirm new password" %><br />
<%= f.password_field :password_confirmation,
autocomplete: "off",
class: "form-control" %>
</div>
<div class="form-group mb-4">
<%= f.submit "Change my password",
class: "btn btn-primary btn-block btn-lg btn-3d white-space-normal" %>
</div>
<% end %>
<%= render "devise/shared/links" %>
</div>
</div>
</div>