generator-any is defined to return #t when any of the item satisfy the predicate,

but srfi-1's any returns the true value the predicate returns.  Using non-boolean

return value of any is common pattern, so I suggest generator-any be do the same.

It also applies generator-every; srfi-1 returns the last return value of predicate

if all the previous application yields true value.  (Though I see using non-boolean

return value of every is less common than any).

Wordings may be tweaked a bit.   My shot:

generator-any pred gen

   Applies pred on each item from generator gen.  As soon as it yields a true value,

   the value is returned without consuming the rest of gen.  If gen is exhausted,

   returns #f.

generator-every pred gen

   Applies pred on each item from generator gen.  As soon as it yields #f, the procedure

   returns #f without consuming the rest of gen.  If gen is exhausted, the last value

   returned from pred is returned.