Function repeat

repeat(text?: null | string, size?: number): undefined | null | string
Returns the repeated string with the given text and size
Parameters
- Optionaltext: null | string
  the source string to inspect
- Optionalsize: number
  the size to pad to
Returns undefined | null | string
the repeated string with the given text and size
Author
David Hsing
Example
```
repeat(undefined, 0);    // undefined
repeat('', 3);    // ''
repeat('z', 3);    // 'zzz'
```