Changes suggested in the PR made

app/views/admin/budget_headings/update.js.erb

@@ -1,5 +1 @@
-<% if @errors %>
-  $("#heading-<%=@heading.id%> div#error_explanation").replaceWith("<%= j render("admin/budget_headings/errors", errors: @errors) %>");
-<% else %>
-  $("#heading-<%=@heading.id%>").html("<td colspan='4'><%= j render("admin/budgets/heading", group: @budget_group, budget: @budget, heading: @heading) %></td>");
-<%  end %>
+$("#<%= dom_id(@budget_group) %>").html('<%= j render("admin/budgets/group", group: @budget_group, headings: @budget_group.headings) %>');

app/views/admin/budgets/_heading.html.erb

@@ -12,16 +12,16 @@
     <%= link_to t("admin.actions.edit"),
             edit_admin_budget_budget_group_budget_heading_path(budget_id: group.budget.id, budget_group_id: group.id, id: heading.id),
             class: "button hollow",
-            remote: true%>
+            remote: true %>
     <%= link_to t("admin.budget_investments.index.title"),
         admin_budget_budget_investments_path(budget_id: group.budget.id, heading_id: heading.id),
-        class: "button hollow"%>
+        class: "button hollow"  %>
     <% if heading.can_be_deleted? %>
       <%= link_to t('admin.administrators.administrator.delete'),
           #admin_budget_budget_group_budget_headings_path(group.budget.id, group.id),
           [:admin, group.budget, group, heading],
           method: :delete,
-          class: "button hollow alert"%>
+          class: "button hollow alert" %>
     <% end %>
   </td>
-</tr>
+</tr>

app/views/admin/budgets/_heading_form.html.erb

@@ -1,4 +1,5 @@
 <%= form_for [:admin, budget, group, heading], remote: true do |f| %>
+  <%= render 'shared/errors', resource: heading %>
   <label><%= t("admin.budgets.form.heading") %></label>
   <%= f.text_field :name,
                     label: false,
@@ -25,6 +26,4 @@
   </div>
 
   <%= f.submit t("admin.budgets.form.save_heading"), class: "button success" %>
-  
-  <div id="error_explanation"></div>
-<% end %>
+<% end %>