Fix sample .iex file in the doc
Fix sample .iex file in the doc

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