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.
By that metric, he did half the work. But it still means he completely disregards the other half.