app/views/locations/edit.html.erb
<h1>edit location</h1>
<%= form_for (@location) do |f| %>
<%= f.label :name %><br/>
<%= f.text_field :name %><br/><br/>
<%= f.label :description %><br/>
<%= f.text_area :description %><br/><br/>
<%= f.label :address %><br/>
<%= f.text_field :address %><br/><br/>
<%= f.submit %>
<% end %>