compare_failure.rb in assay-0.3.0

- old
+ new

@@ -16,9 +16,10 @@
       exp.===(act)
     end
 
     #
     def to_s
+      return @mesg if @mesg
       return super unless @arguments.size == 2
 
       iexp = @arguments[0].inspect
       iact = @arguments[1].inspect
 