Fixed typos in Enum docs
Fixed typos in Enum docs

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