Suggest using %F for `%Y-%m-%d`[uppercased y] time string only

[alexluigit]

680f58ec82d5de7472b288abf7944c42a6c51905 introduced a suggestion for the %Y-%m-%d time string. But for some reason it also prints the suggestion for %y-%m-%d (with lower-cased y).

Ref: https://github.com/alexluigit/dirvish/blob/4a99dc5c9a2d3575183cd368284bb217b35f8007/dirvish-widgets.el#L30 Ref: https://github.com/alexluigit/dirvish/actions/runs/3189587662/jobs/5203562609#step:5:19

[riscy]

Thanks for reporting this! I believe I'm mistakenly matching case-insensitively, so I need to set case-fold-search to nil.

[riscy]

Thanks again -- I think this one has been addressed in https://github.com/riscy/melpazoid/commit/60303dff1d95a47a7b61d3961f1daa9efa999d91, but let me know if not.