UnicodeFuzzySearch: Add parenthesis around the function call.

`chr` or `hex` was eating up everything in the function and treating them all as parameters. (It's interesting that the tests weren't failing and it happens on 5.16 and not 5.18.) Because of that, it results into:

```perl
{
    symbol => "...",
}
```

Instead of:

```perl
{
    symbol => "...",
    code => "...",
    name => "...",
}
```

![capture25](https://cloud.githubusercontent.com/assets/81969/3664578/146f6870-11de-11e4-9453-34f8c697b352.PNG)

CC @mwmiller @mintsoft