Make notes RSS feeds work

app/views/notes/_description.html.erb

@@ -1,7 +1,7 @@
 <div>
   <% description.comments.each do |comment| -%>
   <div class="note-comment" style="margin-top: 5px">
-    <% if comment.author.nil> -%>
+    <% if comment.author.nil? -%>
     <div class="note-comment-description" style="font-size: smaller; color: #999999"><%= t "note.description.#{comment.event}_at", :when => friendly_date(comment.created_at) %></div>
     <% else -%>
     <div class="note-comment-description" style="font-size: smaller; color: #999999"><%= t "note.description.#{comment.event}_at_by", :when => friendly_date(comment.created_at), :user => note_author(comment.author, :only_path => false) %></div>

config/initializers/action_view.rb

@@ -0,0 +1,32 @@
+#
+# Make :formats work when rendering one partial from another
+#
+# Taken from https://github.com/rails/rails/pull/6626
+#
+module ActionView
+  class AbstractRenderer #:nodoc:
+    def prepend_formats(formats)
+      formats = Array(formats)
+      return if formats.empty?
+      @lookup_context.formats = formats | @lookup_context.formats
+    end
+  end
+
+  class PartialRenderer
+    def setup_with_formats(context, options, block)
+      prepend_formats(options[:formats])
+      setup_without_formats(context, options, block)
+    end
+
+    alias_method_chain :setup, :formats
+  end
+
+  class TemplateRenderer
+    def render_with_formats(context, options)
+      prepend_formats(options[:formats])
+      render_without_formats(context, options)
+    end
+
+    alias_method_chain :render, :formats
+  end
+end

lib/nominatim.rb

@@ -1,4 +1,6 @@
 module Nominatim
+  extend ActionView::Helpers::NumberHelper
+
   def self.describe_location(lat, lon, zoom = nil, language = nil)
     zoom = zoom || 14
     language = language || request.user_preferred_languages.join(',')