use do dov for both engines
drop #TODO comments
changing defaults is bad, but I expect ruby folks to expect do to type
do ..
doo has the advantage to get a completion popup .. but its too long to
type
The UtiSnips do snippet didn't make sense: the nested placeholder still
didn't remove the space after the "do" when deleting it - so it was
written badly. Could be fixed, by why bother?
Thus learn do and dov and be happy forever. Would Do be a better choice
(upper case chars?) Don't know. This was used by UltiSnips.
Comment on this commit if you don't like this choice.
UltiSnips snippets are taken from UltiSnips repo.
Putting them nearby the engine seems to be the wrong thing to do.
One reason is that there are two forks now.