> However, the published algorithm for dd' was incorrect! This was discovered and fixed by Rytter in 1980, which we weren't aware of until we received a bug rep

> However, the published algorithm for dd' was incorrect! This was discovered and fixed by Rytter in 1980, which we weren't aware of until we received a bug report. Fits what Knuth said: "Beware of bugs in the above code; I have only proved it correct, not tried it."