I think this comment/discussion ends up over-emphasizing the 'strangeness' of the line-number situation with this library, the page linked ends with: 'This position is subject to discuss. Also it doesn’t stop anyone from forking the code and maintaining line-numbers implementation separately.', which seems pretty reasonable to me!
Yeah, this is pretty much the behavior that I want to see from open source maintainers: make decisions and build conventions but be open to having your mind convinced of alternatives.
