The post is from 2014. I wonder what progress was made since.
Although, perhaps it's deliberate as a canary test for those that intend to defend non-traditional mathematical notation in programming.
a = 100_000 b = 1_000_000
Traditional FORTRAN ignores all spaces, so one can write a million as 1 000 000 there, C++14 allows apostrophes (https://en.wikipedia.org/wiki/Decimal_separator#Data_versus_...)