Sorry, I think you misunderstand me. An ndash is preferred, but what you did was replace what was already visible as an ndash (–) with html code which results in the same thing, but looks more confusing in the wikitext, and wasn't necessary in the first place, since it was already an ndash, rather than a regular short dash. (–=– vs. -, if you see what I mean) Again, not a big deal, just silly to replace something which shows up the same with something which is confusing to more people.