Function truncate

packages/cli/src/utils/block-label.ts:153–158

* Truncate a string to max length, adding ellipsis if needed.

(str: string, maxLength: number)

 * Truncate a string to max length, adding ellipsis if needed.
 */
function truncate(str: string, maxLength: number): string {
  if (str.length <= maxLength) {
    return str
  }
  return `${str.slice(0, maxLength - 1)}…`
}

/**
 * Get a shortened version of a block ID for display.