Marshalled data fails validation with several online validators

[andy-miracl]

When I have a long string value that also contains a single quote, the marshalled yaml fails validation with a number of online yaml validators.

e.g. the third example generated by this code fails in :

https://codebeautify.org/yaml-validator
https://onlineyamltools.com/validate-yaml

package main

import (
	"fmt"
	"github.com/ghodss/yaml"
)

type X struct {
	Y string
}

func main() {

	// single-quotes are ok
	b, _ := yaml.Marshal(X{Y: `'`})
	fmt.Println(string(b))

	// new lines with single quotes are ok
	b, _ = yaml.Marshal(X{Y: `'\n`})
	fmt.Println(string(b))

	// single quotes with wrapped lines causes failed validation
	b, _ = yaml.Marshal(X{Y: `' 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789`})
	fmt.Println(string(b))

The above code outputs :

"Y": ''''

"Y": '''\n'

"Y": ''' 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789
  123456789'

I appreciate that the yaml marshaller outputs valid yaml, but the fact that it fails in some of the most popular online validators is a bit of a frustration.

Is there anything that could be done to tackle this issue?