Slightly polish the documentation for ExUnit.Callbacks
Slightly polish the documentation for ExUnit.Callbacks

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