Add missing guards to functions in Keyword (#8992)
Add missing guards to functions in Keyword (#8992)


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