Clarify docs for Macro.expand_all/2
Clarify docs for Macro.expand_all/2

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