Fix color_background/3 exception tests (#4949)
Fix color_background/3 exception tests (#4949)


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