SECURITY UPDATE: code injection in the netrw plugin via directory
history serialization: s:NetrwBookHistSave() wrote each directory
history entry into the generated .netrwhist script by concatenating
the raw value inside single quotes, so a directory name containing a
single quote and vimscript was evaluated when the history file was
sourced.
debian/patches/CVE-2026-47162.patch: quote the value with string()
so the history entry is emitted as a safe vimscript string literal,
in runtime/autoload/netrw.vim; matches upstream patch 9.2.0495.