Documenting sscanf()'s and fscanf's underflow

Hi all, may I request that the documentation pages for sscanf() and fscanf() be reviewed? Last week, I tripped over a bug in my code because, despite using and loving sscanf() for many years, the function unexpectedly returned -1 for the number of successful captures when I expected 0. I've documented the encounter here: https://stackoverflow.com/q/79942833/2943403 I have been doing a fair amount of Google searching, but either my keywords are not ideal or there really is no mention of this floating around (even the C++ pages that I read don't mention it). Thanks, mickmackusa