Highlight current page in menus.

The current page will have the "current" HTML class applied to its
relevant list item in the auto-generated menus (note that there's no
styling in the default theme to reflect it, but its useful if you're
making your own design).

CHANGES

@@ -3,6 +3,9 @@
  * Strip trailing # characters from Markdown headings at the top of a
    page.
 
+ * Add an HTML class ("current") to the menu items whose path matches
+   the current page.
+
  * Bug fix: Don't render the return value of local_stylesheet_link_tag
    directly into the page (haml_tag now writes direct to the output
    buffer).

lib/nesta/navigation.rb

@@ -21,7 +21,8 @@ def display_menu_item(item, options = {})
             end
           end
         else
-          haml_tag :li do
+          html_class = (request.path == item.abspath) ? "current" : nil
+          haml_tag :li, :class => html_class do
             haml_tag :a, :<, :href => item.abspath do
               haml_concat item.heading
             end