Function truncate

truncate(str: string, num: number, truncateString??: string): string
Truncates a string up to a specified length

Example
```
truncate('boomerang', 7); // 'boom...'
```
Example
```
truncate('boomerang', 7, '....'); // 'boo....'
```
Parameters
- str: string
- num: number
- Optional truncateString: string = "..."
Returns string
- Defined in string/truncate/index.ts:11

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