Add head for GenServer.whereis/1 to match spec
Add head for GenServer.whereis/1 to match spec

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