Slightly reword the docs for IEx.Helpers.ls/1
Slightly reword the docs for IEx.Helpers.ls/1

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