mkdocs-material/material/.icons/fontawesome/solid/minus.svg

<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 448 512"><!--! Font Awesome Free 6.1.2 by @fontawesome - https://fontawesome.com License - https://fontawesome.com/license/free (Icons: CC BY 4.0, Fonts: SIL OFL 1.1, Code: MIT License) Copyright 2022 Fonticons, Inc.--><path d="M400 288H48c-17.69 0-32-14.32-32-32.01S30.31 224 48 224h352c17.69 0 32 14.3 32 31.99S417.7 288 400 288z"/></svg>