https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115822
--- Comment #5 from Andrew Pinski <pinskia at gcc dot gnu.org> --- (In reply to Bruno Pitrus from comment #3) > I came up with this enhancement _specifically_ because the libstdc++ headers > are hard to read due to inconsistent use of tabs vs spaces. If your editor > is set to anything other than 8, the system headers look misleading. Well I am sorry but tabs have been 8 since forever and it has part of the gnu coding style for over 20 years now; closer to over 30 years now.