Improve guards in Regex module
Improve guards in Regex module

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