What types does the function expect and return?

Question

RepoPilot · Accepted Answer

The `escapeStringRegexp` function expects and returns strings.

According to the TypeScript definition in [index.d.ts:L16-L17], the function signature is:

```typescript
export default function escapeStringRegexp(string: string): string;
```

This means:
- **Input**: expects a `string` parameter
- **Output**: returns a `string`

The implementation in [index.js:L1-L4] also enforces this by throwing a `TypeError` if the input is not a string:

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

The TypeScript tests in [index.test-d.ts:L4] confirm the return type is string via `expectType<string>(...)`.

FOLLOW_UPS:
- What characters does the function escape?
- How does the function handle the hyphen character?
- What are some usage examples shown in tests?