Minor grammatical improvements to mix documentation (#5102)
Minor grammatical improvements to mix documentation (#5102)


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