Fix typo in IEx.Helpers.h/1
Fix typo in IEx.Helpers.h/1

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