Rakefile in jekyll-2.0.0.alpha.2 vs Rakefile in jekyll-2.0.0.alpha.3

@@ -178,10 +178,10 @@
     # Commit and push.
     puts "Committing and pushing to GitHub Pages..."
     sha = `git log`.match(/[a-z0-9]{40}/)[0]
     Dir.chdir('gh-pages') do
       sh "git add ."
-      sh "git commit -m 'Updating to #{sha}.'"
+      sh "git commit --allow-empty -m 'Updating to #{sha}.'"
       sh "git push origin gh-pages"
     end
     puts 'Done.'
   end