Phil Boswell wrote:
Like this you mean? http://en.wikipedia.org/wiki/User:Phil_Boswell/Sandbox/Double_apostrophe
Exactly.
(If it was me, though, I'd use U+200C Zero Width Non-Joiner or maybe U+200B Zero Width Space. I believe the intent of U+200D Zero Width Joiner is that it tries to force ligatures, especially in scripts like Arabic that have lots of ligated characters, and fancy rules for when or when not to ligate them automatically. Clearly the double apostrophe isn't a ligature; it's just something you didn't want joined, in this case by the wiki markup parser.)