Correct documentation of `incremental_skip_later` flag
Correct documentation of `incremental_skip_later` flag

The behavior is actually the opposite of what is documented.

jackwilsdon/beets,SusannaMaria/beets,shamangeorge/beets,ibmibmibm/beets,jackwilsdon/beets,sampsyo/beets,SusannaMaria/beets,ibmibmibm/beets,beetbox/beets,shamangeorge/beets,sampsyo/beets,shamangeorge/beets,shamangeorge/beets,jackwilsdon/beets,SusannaMaria/beets,jackwilsdon/beets,sampsyo/beets,beetbox/beets,ibmibmibm/beets,sampsyo/beets,beetbox/beets,ibmibmibm/beets,SusannaMaria/beets,beetbox/beets