Regex help

[config2000]

UPDATE - Found a way to solve (see end of post)

Hello all,
I am trying to understand how to use regex but I just can't figure it out.

What I want to do is pass a string and get a returned string that replaces - and _ with spaces. Also each word to be separated by one space only.

From the code I am trying to get the result: test one two fold
Here is where I have got to but I just don't know how to get regex to work:

import regex
message:='test _one_    two-fold'
mut re:=regex.new()
res:=re.replace(message,r'[_-]')
println(res)

Solution found

import regex
message:='test _one_    two-fold'
mut re:=regex.regex_opt('[-_ ]+') or { panic(err) }
words:=re.split(message)
println(words)       // ['test', 'one', 'two', 'fold']