Function truncate

truncate(str: string, length: number, ellipsis?: string): string
Truncates a string to a specified length and adds ellipsis if needed.
Parameters
- str: string
  The input string.
- length: number
  The maximum length.
- ellipsis: string = "..."
  The string to append (default: "...").
Returns string
The truncated string.
- Defined in formatting/string.ts:53