Root path in http request line doesn't highlighted

**Information**
- Language: http
- Plugins: none


**Description**

When path is `/` (root) in request line, it doesn't parsed as path.

**Code snippet**

works

```http
GET /path HTTP/1.1
Host: example.com
```

doesn't works

```http
GET / HTTP/1.1
Host: example.com
```

