I received an ad from StackOverflow, introducing their "Documentation"
feature in beta, here http://stackoverflow.com/tour/documentation. It seems
useful for tutorials, too. You can have a look.
It needs at least five requests for the #ats tag to allow us to create
documents. Anyone interested is welcomed to click the following link to
help make it happen. http://stackoverflow.com/documentation/ats/commit
I attach here a screenshot for a Python documentation.