https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87353
--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> --- This was introduced by r242433 https://gcc.gnu.org/viewcvs/gcc/trunk/gcc/doc/invoke.texi?limit_changes=0&r1=242433&r2=242432&pathrev=242433