Sure he probably did most of the coding, but it's still weird to talk all about I and not mention the other 5 in a single word when they _did_ contribute. Maybe they did testing or other things that are not reflected in LOC, e.g. presentations etc.
I see the point of contention now. Though I don't think we're being fooled by LOC's. You can check the commits from the other contributors, and it's all documentation / adding line breaks. It's unfortunately common at universities for CS projects to be spearheaded by one gungho student with the others only tidying things up for in-class presentations.
It's also not 56 vs 46 commits but 56 vs 63. 46 is the second biggest committee but there are 17 more commits from the other 4 and my initial point was that it was odd for him to not mention the other contributors at all. Even if he did the major part, I would never say I created something if it was a team effort. He lead.
In fact if you go on GitHub, their project presentation lists a 6 people team: https://docs.google.com/presentation/d/117dGuEK98-TwAPGUBijf.... He was on the backend team, but still mentions angular in the LinkedIn post.
Did the others not do anything? Or why is he not giving them credit in the LinkedIn post?