[BUG]RTF invalid when first row has empty 2nd NAT

[vincewu51]

Describe the bug
When the player in the first row of the RTF has no 2nd NAT, replace faces gives an 'invalid RTF' error. If 2nd NAT is added, the error gives away.

To Reproduce
Use any RTF without 2nd NAT in the first row and click 'replace faces'.

Expected behavior
Finished

Screenshots

Desktop (please complete the following information):
windows

Attachments
Add your newgan.log and RTF-File

[Maradonna90]

can you provide the RTF-file?

[xaser-one]

Hey, just to add a little more info on this:
The regex in the is_rtf_valid function seems to be too restrictive - it only matches lines with 2 nationalities, meaning if every player in the file only has 1 nationality, the validation fails. Also player names with special chars (dot, dash, apostrophe) never match.

Example on pythex.org

[Maradonna90]

@xaser-one good point. Thats should probably solve the problem.