package main
import (
"regexp"
"fmt"
)
func main() {
var re = regexp.MustCompile(`[^,.;!?]\K</h[1-6]>`)
var str = `<p>Today, not only we have so many breeds that are trained this and that.</p>
<h4><strong>We must add a dot after the closing strong</strong></h4>
<p>Hunting with your dog is a blah blah with each other.</p>
<h2>No need to change this one!</h2>
<p>Hunting with your dog is a blah blah with each other.</p>`
var substitution = ".$0"
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/