package main
import (
"regexp"
"fmt"
)
func main() {
var re = regexp.MustCompile(`(?m)(?:\G(?!^)|\()[^()\s]*\K\s+(?=[^()]*\.md\))`)
var str = `[probability space](posts/probability space.md) is ... [Sigma Field](posts/Sigma Field.md)`
var substitution = "_"
fmt.Println(re.ReplaceAllString(str, substitution))
}
Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for Golang, please visit: https://golang.org/pkg/regexp/