Multiline copyright missing from license file

### Description

We found a package where author/copyright information is missing from a license file.
It looks like only the first author of a list is represented in the scan result.

### How To Reproduce

https://github.com/formidablelabs/victory.git
commit dd86278d205f3f306e2ab38c317a6f9c56f0a6f8

Copyrights found:
```
copyrights:
- statement: "Copyright (c) 2014-present, Facebook, Inc."
location:
path: "packages/victory-core/src/victory-util/immutable-types.d.ts"
start_line: 2
end_line: 2
- statement: "Copyright (c) 2015-2020 Formidable Labs"
location:
path: "LICENSE.txt"
start_line: 3
end_line: 3
- statement: "Copyright (c) 2016-2020 Alexey Svetliakov "
location:
path: "LICENSE.txt"
start_line: 5
end_line: 5
```

However in the **LICENSE.txt** file we can see:
```
Copyright (c) 2016-2020 Alexey Svetliakov ,
snerks , Krzysztof Cebula , Vitaliy Polyanskiy , James Lismore
, Stack Builders , Esteban Ibarra , Dominic Lee
, Dave Vedder , Alec Flett and potentially other
DefinitelyTyped contributors.
```

### System configuration

> For bug reports, it really helps us to know:

* What OS are you running on? (Windows/MacOS/Linux)
* Linux
* What version of scancode-toolkit was used to generate the scan file?
* 32.1.0
* What installation method was used to install/run scancode? (pip/source download/other)
* Python (via ORT 22.5.0)