Debian stopped including the major version number in the emacs package
name after version 25, so there is no 'emacs27-dbg' package.
We may as well drop this clause altogether, since Debian stable has
version 26.
No need to merge to master (where this information is in etc/PROBLEMS
in any case).
Emacs debugging symbols are distributed by a debug package. It does
not exist for every released Emacs package, this depends on the
distribution. On Debian-based systems, you can install a debug
-package of Emacs with a command like 'apt-get install emacs-dbg' (on
-older systems, replace 'emacs' with eg 'emacs27'). On Red Hat-based
-systems, the corresponding command is 'dnf debuginfo-install emacs'.
+package of Emacs with a command like 'apt-get install emacs-dbg'.
+On Red Hat-based systems, the corresponding command is
+'dnf debuginfo-install emacs'.
DETAILED BUILDING AND INSTALLATION: