I'm a real noob to ruby on rails. I started yesterday so yea, but I've seen a couple of "do" in ruby and I couldn't find a really good answer for it. A place where I saw a do was in the gemfile.
group :development, :test do
gem 'simplecov', :require => false
do keyword is used together with the
end keyword to delimit a code block.
More info on the difference of
do end with brackets may be found here: http://ruby-doc.org/docs/keywords/1.9/files/keywords_rb.html#M000015