Fixed calls to super in GenServer.Behaviour example
Fixed calls to super in GenServer.Behaviour example

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