Update lib/elixir/lib/hash_dict.ex
Update lib/elixir/lib/hash_dict.ex

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