Add a note about apply/3, closes #7740
Add a note about apply/3, closes #7740

kelvinst/elixir,ggcampinho/elixir,elixir-lang/elixir,pedrosnk/elixir,pedrosnk/elixir,kelvinst/elixir,kimshrier/elixir,lexmag/elixir,kimshrier/elixir,joshprice/elixir,michalmuskala/elixir,lexmag/elixir,ggcampinho/elixir