Fixing typos in Stream docs
Fixing typos in Stream docs

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