ert--plist-difference-explanation

ert--plist-difference-explanation is a compiled Lisp function in `ert.el'.

(ert--plist-difference-explanation A B)

Return a programmer-readable explanation of why A and B are different plists.

Returns nil if they are equivalent, i.e., have the same value for
each key, where absent values are treated as nil. The order of
key/value pairs in each list does not matter.