Polish the docs for a couple of IEx helpers
Polish the docs for a couple of IEx helpers

[ci skip]

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