Re: equality predicate option for `next-single-property-change'?

[Joe Corneli]

       It seems like `next-single-property-change' and other
       functions for text property search should take an optional
       predicate to be used in the test.

   Why?  Have you found a situation where you actually needed this?

My use case is: the property that is being maintained is a list, the
elements of which can be arbitrary lisp objects, e.g, strings.

(eq '("a" "b" "c") '("a" "b" "c")) ;=> nil

(equal '("a" "b" "c") '("a" "b" "c")) ;=> t