Polish the docs for functions in StringIO
Polish the docs for functions in StringIO

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