Improve docs and style on unicode.ex
Improve docs and style on unicode.ex

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