Ajouter une image dans un antes depois

h2:before{
	content: '';
    background-image: url(../img/img.svg);
    background-size: 32px 32px;
    display: inline-block;
    width: 32px;
    height: 32px;
    background-repeat: no-repeat;
    padding: 0 7px;
}
Fahrenheit451