del,
ins {
    display: block;
    text-decoration: none;
    position: relative;
}

del {
    background-color: #fbb;
}

ins {
    background-color: #d4fcbc;
}

del::before,
ins::before {
    position: absolute;
    left: .5rem;
    font-family: monospace;
}

del::before {
    content: '−';
}

ins::before {
    content: '+';
}

p {
    margin: 0 1.8rem 0;
    font-family: Georgia, serif;
    font-size: 1rem;
}