Re: thunk.el: Document that thunk-force == funcall?

[Alfred M. Szmidt]

   > thunks are functions.

   thunks take no arguments (at least the definition i know)

   > The background: because thunks are functions, one is allowed (and it is
   > useful) to directly pass them to higher order functions e.g. as a test
   > predicate,

   a test predicate usually takes at least one argument

And returns a value -- something which thunks also do not.

   thus a thunk cannot be used as a test predicate