Update lib/elixir/lib/string.ex
Update lib/elixir/lib/string.ex

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