"markdown: redcarpet2" should be "markdown: redcarpet" ?

[bluealert]

https://github.com/clayallsopp/rubymotion-tutorial/blob/master/_config.yml

markdown: redcarpet2

should be

markdown: redcarpet

or there is an error:

Generating... 
Invalid Markdown Processor: redcarpet2
                    Valid options are [ maruku | rdiscount | kramdown | redcarpet ]
  Conversion error: Jekyll::Converters::Markdown encountered an error converting '_posts/chapters/1900-01-01-0-in-motion.md/#excerpt'.
  Conversion error: Invalid Markdown Processor: redcarpet2
             ERROR: YOUR SITE COULD NOT BE BUILT:
                    ------------------------------------
                    Invalid Markdown Processor: redcarpet2