undo#ftplugin

[Konfekt]

These boilerplates

if exists('b:undo_ftplugin')
  let b:undo_ftplugin .= "|setl cms<"
else
  let b:undo_ftplugin = "setl cms<"
endif

are so ubiquitous that maybe

https://github.com/benknoble/Dotfiles/blob/706dab275cc9d31c168a3aaf7bd992b3131c3983/links/vim/autoload/bk/ftplugin.vim#L11

could be proposed upstream? Maybe even included in C.

[benknoble]

Yea! I'll add this to my unfortunately-long todo list 😅

[benknoble]

I've opened https://github.com/vim/vim/discussions/17353