[Bug gcov-profile/94928] Doc comments in gcov-io.h do not show cwd and unexec blocks in the Notes file format

[marxin at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94928

--- Comment #8 from Martin Liška <marxin at gcc dot gnu.org> ---
Or even better: you can merge various .gcda files with:
gcov-tool merge ...
https://gcc.gnu.org/onlinedocs/gcc/Gcov-tool-Intro.html