How do you read a .rdoc file on a Mac?

Question

How do you read a .rdoc file on a Mac?

If I double-click it tells me there is no default application to read it.

Answer 1

I found no references to "rdoc" extension except from Ruby RDoc automated documentation generator. In this context these files are plain text files with some wiki-like markup. They can be opened in any text editor (or rename it to .txt if you want).

Answer 2

Hmm, if it is a Ruby Document file, I suppose you can just open it in a text editor (e.g. TextEdit).