app/views/groups/edit.html.erb
<% provide :button_text, "Update group" %>
<div class="container-fluid bg-light pb-2">
<div class="container">
<div class="row justify-content-md-center">
<div class="col-md-8 mb-4">
<h2 class="text-center mt-2rem mb-2rem pt-1 pb-2">
Edit group
</h2>
<%= render "form", group: @group %>
</div>
</div>
</div>
</div>