How does this function validate its input — does it throw on bad arguments?

Question

RepoPilot · Accepted Answer

Yes, the function validates its input and throws on bad arguments.

In [index.js:L2-L4], the `escapeStringRegexp` function includes a type check:

```javascript
if (typeof string !== 'string') {
    throw new TypeError('Expected a string');
}
```

If you pass anything other than a string (such as a number, object, null, or undefined), the function will throw a `TypeError` with the message "Expected a string". This validation happens before any escaping logic is performed.

FOLLOW_UPS:
- What characters does this function actually escape?
- How are hyphens treated differently from other characters?
- Can you use the escaped output in any regex context?