Re: dired-hide-details-mode have no effect suddenly

[Tomas Nordin]

> Aha, perfect.  I guess I'm not the only one who learned that lesson
> the hard way.

Yes, perfect and yes, I guess not too. Let's try to summarize the
lesson:

If there is a problem with dired-hide-details-mode and you happen to use
markdown-mode, make sure you have the latest version of markdown-mode,
it has improved its way of handling `font-lock-extra-managed-props`.