I see in the statistics for the Stellarium the language AMPL, what is big surprise for me: https://www.openhub.net/p/stellarium/analyses/latest/languages_summary
I've tried find the problematic files and I've found them! Example: https://www.openhub.net/p/stellarium/commits/673200949 or just see the source code of this file: https://github.com/Stellarium/stellarium/blob/master/nebulae/default/names.dat
This file do not contain any code - just and formatted plain text file. So AMPL is completely a wrong guess here.
Please check the work of AMPL parser.