show the diff too

Author: kenman345

Gemfile

@@ -4,6 +4,7 @@ source 'https://rubygems.org'
 gem 'github-pages', group: :jekyll_plugins
 
 group :test do
+  gem 'diffy'
   gem 'fastimage'
   gem 'html-proofer'
   gem 'kwalify'

verify.rb

@@ -1,6 +1,7 @@
 require 'yaml'
 require 'fastimage'
 require 'kwalify'
+require 'diffy'
 @output = 0
 
 # Image max size (in bytes)
@@ -71,10 +72,11 @@ def process_sections_file(path)
     end
 
     # Check section alphabetization
-	if websites != (sites_ordered = websites.sort_by { |s| s['name'].downcase })
-      error("_data/#{section['id']}.yml not ordered by name. Correct order:")
-      sites_ordered.each { |site| error("  #{site['name']}\n") }
-	end
+	if websites != (sites_sort = websites.sort_by { |s| s['name'].downcase })
+      error("_data/#{section['id']}.yml not ordered by name. Correct order:" \
+        "\n" + Diffy::Diff.new(websites.to_yaml, sites_sort.to_yaml, \
+                               context: 10).to_s(:color))
+    end
 
     # Collect list of all images for section
     imgs = Dir["img/#{section['id']}/*"]