Improve <<>> docs
Improve <<>> docs

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