Hello, 

As part of SG-16-Unicode efforts to improve C++'s lexing wording and Unicode friendliness (a lot of which is summarized in wg21.link/P2178R1), I've extracted a small preprocessor wording fix that may interest C folks given the wording is exactly the same and there is some value in keeping the lexing of both languages consistent! 

https://isocpp.org/files/papers/D2316R0.pdf

Have a great week end,

Corentin