README.md in nanoc3-3.1.0a2 vs README.md in nanoc3-3.1.0a3

@@ -3,9 +3,11 @@
 nanoc is a simple but very flexible static site generator written in Ruby.
 It operates on local files, and therefore does not run on the server. nanoc
 “compiles” the local source files into HTML (usually), by evaluating eRuby,
 Markdown, etc.
 
+Note: This documentation looks best with Yardoc, not RDoc.
+
 ## Resources
 
 The [nanoc web site](http://nanoc.stoneship.org) contains a few useful
 resources to help you get started with nanoc: