Fixed doc typos in Regex
Fixed doc typos in Regex

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