Atom#to_s tests.
Atom#to_s tests.

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