yard.rb in yard-dm-0.1.1

- old
+ new

@@ -1,10 +1,11 @@
 require 'yard'
 
 YARD::Rake::YardocTask.new do |t|
   t.files   = ['lib/**/*.rb']
   t.options = [
-    '--files', 'History.rdoc',
+    '--markup', 'markdown',
+    '--files', 'History.md',
     '--title', 'yard-dm'
   ]
 end
 
 task :docs => :yard