doc/mkdocs-material/material/templates/.icons/material/arrow-left-bold-box-outline.svg

<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"><path d="m7 12 5-5v3h4v4h-4v3zm14-7v14a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V5a2 2 0 0 1 2-2h14a2 2 0 0 1 2 2m-2 0H5v14h14z"/></svg>