(defun scan-buf-move-to-region (prop &optional arg hook)
"Go to the start of the next region with non-nil PROP property.
Then run HOOK, which should be a quoted symbol that is a normal
-hook.variable, or an expression evaluating to such a symbol.
+hook variable, or an expression evaluating to such a symbol.
Adjacent areas with different non-nil PROP properties are
considered different regions.