key = keys => html`${keys.split(" ").map(key => `<span style="
font-family: -apple-system, BlinkMacSystemFont, 'avenir next', avenir,
helvetica, 'helvetica neue', ubuntu, roboto, noto, 'segoe ui', arial,
sans-serif;
font-size: 14px;
font-weight: 500;
box-shadow: 0 0 0 1px #dedede, 1px 1px 0 1px #e8e8e8;
margin: 0 4px;
min-width: 6px;
padding-left: 4px;
padding-right: 4px;
text-align: center;
white-space: nowrap;
border-radius: .25rem;">${key}</span>`).join("")}`