`unless` argument clarification
`unless` argument clarification

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