I have a question to the Plugin: deprecated-functions.

In the Overview page i have clicked the "Check deprecated use" Button.

That was the result:

Locate calls on deprecated functions.
In Themes
album.php

next_album+
next_image+

index.php

next_album+

search.php

next_album+
next_image+

favorites.php

next_album+
next_image+

In User plugins
site_upgrade

next_album and next_image are not marked as deprecated in the docs. ?
Is there a equivalent to next_album and next_image? Or is it a hoax?

No hoax, this is actually explained on the note right above the page you are just looking at.

The + means that outdated parameters are used for some reason. In this case it is just doing nothing and does no harm.

You mean that?

NOTE: This search will have false positives for instance when the function name appears in a comment or quoted string. Functions flagged with an "*" are class methods. Ones flagged "+" have deprecated parameters.

Yes…

Ones flagged "+" have deprecated parameters.