How to remove the string concerned from the original string

@shahryarjb you could also use:

iex> string = "125-1jump-test-for12-test-125-"
iex> Regex.replace(~r/^\d+-/, string, "")
"1jump-test-for12-test-125-"

@david_ex do you know if there are any big differences between the two functions? (will try to check the source later today)