I put into
((nil . ((eval . (message "OK")))))
I don't see message when I
revert-buffer for file in directory.
I can't find docs about
mode in Emacs v25 info.
Are those special keys removed?
You can specify the variables mode, eval, and unibyte in your .dir-locals.el, and they have the same meanings as they would have in file local variables. coding cannot be specified as a directory local variable.
There is no such text in my v25.3.1 info...