ruby-end-mode does not always behave correctly. An example for that is
if statements, which don't have an end statement if they are written on
one line. Also, it feels dirty to use a Ruby package to implement Elixir
syntax behaviour.
Smartparens has functionality to define pairs for certain major modes.
This adds smartparens pairs for the "do" keyword and the arrow (->)
operator, so that the "end" keyword is automatically inserted and
properly indented on enter.
Start to isolate the list of packages. Also we want to define packages
function at the top level of an elisp file in order to not prevent
emacs from knowing where the functions are defined.
This commit has a POC made with elfeed and elixir layers.
