I am aware of How to place all auto-save files in a directory, but I cannot figure it out from Emacs manual how to save all
auto-save versions and all
backup copies of a given file in a subdirectory sitting in same parent directory where the file resides?
For example, if I am editing file
etiology-macro.lisp, I would need to keep all auto-save and backup versions of that file in subdirectory
path/to/directory/ etiology-macro.lisp auto-save-and-backup-subdirectory/ etiology-macro.lisp.20170827-132731 etiology-macro.lisp.20170827-133007 etc.
How to set auto-save and backup path as subdirectory sibling of a given open file?