bug#33664: 26.1; Document vars and functions in `cursor-sensor.el'

[Drew Adams]

> AFAIK, about the only person who could do something about this doesn't
> read bug reports.

Maybe you mean might instead of could?  Anyone who has
the will could, I suppose.

But maybe the use of the variable as a list value is
only an Isearch thing (that's the only place it's used,
so far), and is not something intended/prescribed by
`cursor-sensor.el'.

Juri reads bug reports, and he has worked on Isearch
(dunno whether he worked on this part of it).  Maybe
the design/use of the var for Isearch could be
documented in a comment in `isearch.el', at least.

But if its use as a list is part of the general
design/intention then that should be made clear in
`cursor-sensor.el', I think.