Fix invalid bit syntax in docs.
Fix invalid bit syntax in docs.

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