Mention ArgumentError in Process docs
Mention ArgumentError in Process docs

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