TLDR: OMG text is difficult! In this article, unusually, text is difficult because of naive expectations, not because of incompetence. For example, the treatm

TLDR: OMG text is difficult! In this article, unusually, text is difficult because of naive expectations, not because of incompetence. For example, the treatment of case-insensitive comparisons is quite good, but the author thinks that counting "characters" should be simple and well-defined, that conversion between uppercase and lowercase characters should be reversible, and that that one can "obviously use well supported libraries that solve this problem for you".