What version of Go are you using (go version)?

Not only the latest one, I think it's an old bug.

$ go version
go version go1.19.1 darwin/amd64

Does this issue reproduce with the latest release?

Yes

What operating system and processor architecture are you using (go env)?

N/A

What did you do?

https://go.dev/play/p/SyukPDzcZ6a

func main() {
	t := template.New("a")
	_, _ = t.Parse("<script>a=`//`</script>")
	w := &bytes.Buffer{}
	_ = t.Execute(w, nil)
	b, _ := io.ReadAll(w)
	println(string(b))
}

What did you expect to see?

Correct result:

<script>a=`//`</script>

What did you see instead?

Broken result:

<script>a=`</script>