Better page_title helper handling for nested blocks

app/helpers/dunlop/application_helper.rb

@@ -90,17 +90,18 @@ module Dunlop
       scope_model.human_attribute_name(attribute_name)
     end
 
-    def page_title(*args)
-      res = content_tag :h3, class: 'page-title ui header' do
-        if resource_title?(args)
-          @scope_model = args[1].is_a?(ActiveRecord::Base) ? args[1].class : args[1]
-          page_title_for_resource(args)
-        else
-          page_title_for_string(args)
-        end
+    def page_title(*args, &blk)
+      extra_content = capture(&blk) if blk.present?
+      if resource_title?(args)
+        @scope_model = args[1].is_a?(ActiveRecord::Base) ? args[1].class : args[1]
+        content = page_title_for_resource(args)
+      else
+        content = page_title_for_string(args)
       end
-      content_for :page_title, res
-      res
+      content += extra_content if extra_content.present?
+      title_tag = content_tag(:h3, content, class: 'page-title ui header')
+      content_for :page_title, title_tag
+      title_tag
     end
 
     def resource_title?(args)
@@ -109,7 +110,7 @@ module Dunlop
     end
 
     def page_title_for_string(args)
-      title = args.first
+      title = html_escape(args.first)
       options = args.last.is_a?(Hash) ? args.last : {}
       if back_options = options[:back]
         url =
@@ -120,7 +121,7 @@ module Dunlop
           end
         if url
           back_link = link_to content_tag(:i, nil, class: 'left arrow icon'), url, class: 'title-back-link'
-          title = [back_link, title].join.html_safe
+          title = back_link.safe_concat(title)
         end
       end
       title
@@ -130,9 +131,9 @@ module Dunlop
       options = args.extract_options!
       model = args[1].respond_to?(:model_name) ? args[1] : args[1].class
       if args.first == :index
-        title = t('action.index.label', models: model.model_name.human_plural)
+        title = t('action.index.label', models: model.model_name.human_plural).html_safe
       else
-        title = t("action.#{args.first}.label", model: model.model_name.human)
+        title = t("action.#{args.first}.label", model: model.model_name.human).html_safe
       end
       if back_options = options[:back]
         url =
@@ -143,7 +144,7 @@ module Dunlop
           end
         if url
           back_link = link_to content_tag(:i, nil, class: 'left arrow icon'), url, class: 'title-back-link'
-          title = [back_link, title].join.html_safe
+          title = back_link.safe_concat(title)
         end
       end
       title