Clarify whereis docs, closes #10106
Clarify whereis docs, closes #10106

ggcampinho/elixir,kimshrier/elixir,elixir-lang/elixir,joshprice/elixir,pedrosnk/elixir,kelvinst/elixir,ggcampinho/elixir,michalmuskala/elixir,pedrosnk/elixir,kelvinst/elixir,kimshrier/elixir