package main
import (
"regexp"
"fmt"
)
func main() {
var re = regexp.MustCompile(`(?m)([^\v]{0,80})(?:\s|$)`)
var str = `There are usually about 200 words in a paragraph, but this can vary widely. Most paragraphs focus on a single idea that's expressed with an introductory sentence, then followed by two or more supporting sentences about the idea. A short paragraph may not reach even 50 words while long paragraphs can be over 400 words long, but generally speaking they tend to be approximately 200 words in length.`
var substitution = "$1\n"
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/