that complains if FORM ever does return differing values."
form)
+(defmacro def-edebug-spec (symbol spec)
+ "Set the `edebug-form-spec' property of SYMBOL according to SPEC.
+Both SYMBOL and SPEC are unevaluated. The SPEC can be 0, t, a symbol
+\(naming a function), or a list."
+ `(put (quote ,symbol) 'edebug-form-spec (quote ,spec)))
+
(defmacro lambda (&rest cdr)
"Return a lambda expression.
A call of the form (lambda ARGS DOCSTRING INTERACTIVE BODY) is