Improve license parsing

[FedericoMassaioli]

Problem description

When the license is cut and pasted to Sublime Text 4189 (from the original email sent after buying it) it is reported as invalid if in the cut&paste process newline characters where changed into space.

It is necessary to restore end of lines as shown in the email.

1. The message that reports the license as invalid is misleading
2. Given the licence structure, it should be pretty easy to parse it even if new line characters are changed in spaces. It's all whitespace, anyhow.

Thanks

Preferred solution

Better parsing of licenses

Alternatives

In absence of newline characters, do not sentence the license as invalid in the error message and suggest restoring proper formatting

Additional Information

No response