[Bug middle-end/120544] [15/16 Regression] extend.texi causes a build failure for makeinfo 4.13 (and before)

[kirill at korins dot ky via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=120544

--- Comment #13 from Kirill A. Korinsky <kirill at korins dot ky> ---
Created attachment 62055
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=62055&action=edit
gcc-15-fortran-docs.diff

Here a few more pices which I needed to be able to use makeinfo 4.8.