excalidraw/src/components/ActiveFile.scss

.excalidraw {
  .ActiveFile {
    .ActiveFile__fileName {
      display: flex;
      align-items: center;

      span {
        text-overflow: ellipsis;
        overflow: hidden;
        white-space: nowrap;
        width: 9.3em;
      }

      svg {
        width: 1.15em;
        margin-inline-end: 0.3em;
        transform: scaleY(0.9);
      }
    }
  }
}