csail/6006psets_ng — comment on commit 25b6cb1c513906c0ba97768d5ad90d2152adfec4
File: 5/code/rsa/big_num.rb line 18
By pwnall:

Please add parens to make the order of operations clear. Also, please use `dup` to copy arrays, it's more obvious than Python-style slices.

```ruby
@d = (no_copy and digits.length == size) ? digits : digits.dup
```