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regex - Scala: How to replace all consecutive underscore with a single space?

I want to replace all the consecutive underscores with a single space. This is the code that I have written. But it is not replacing anything. Below is the code that I have written. What am I doing wrong?

import scala.util.matching.Regex

val regex: Regex = new Regex("/[\W_]+/g")
val name: String = "cust_id"
val newName: String = regex.replaceAllIn(name, " ")
println(newName)

Answer: "cust_id"

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You could use replaceAll to do the job without regex :

val name: String = "cust_id"
val newName: String = name.replaceAll("_"," ")
println(newName)

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