URLs between brackets in comments not correctly linked if they have a question mark after bracket

When URLs in comments are autoconverted to links, it detects URLs enclosed in brackets, so

```
(url)
```

will be correctly converted to

```html
(<a href="url">url</a>)
```

Even if a comma exists after the bracket:

```
(url),
```

it will be correctly converted to

```html
(<a href="url">url</a>),
```

But it will fail if a question mark exists after the bracket:

```
(url)?
```

will be converted to:

```html
(<a href="url)?">url)?</a>
```

Here is an example: http://www.meneame.net/c/14472225