Text with three dots is parsed as URL while text with two dots is not

The text `...and` is parsed as an URL while the text `..and` is not.

Test to reproduce it:
```dart 
expectListEqual(
    linkify("...and", options: LinkifyOptions(looseUrl: true)),
    [TextElement('...and')],
);
```
Output:
`Expected [LinkElement: 'http://...and' (...and)] to be [TextElement: '...and']`

This test runs ok:
```dart 
expectListEqual(
    linkify("..and", options: LinkifyOptions(looseUrl: true)),
    [TextElement('..and')],
);
```

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