Support contenteditable better with \u00a0 characters

[OscarGodson]

As you know from my ticket, contneditables will convert spaces to \u00a0. From: http://www.fileformat.info/info/unicode/char/A0/index.htm

It's decomposition is actually a \u0020, or, a space. It'd be nice if Marked checked for both of those characters since they mean almost the same thing. I can't imagine someone wanting to keep a no-break space but convert spaces.

Thoughts?

[chjj]

I guess we should check for \u2424 as well? Are there any other weird unicode characters?

Probably fixed with this in block.lexer:

src = src.replace(/\u00a0/g, ' ');
src = src.replace(/\u2424/g, '\n');

[OscarGodson]

Probably. I'd say whatever would be the expectation since I think almost everyone would be using this in some sort of automated fashion where special characters would make it in there depending on browser, platform, even language. This is for sure the best parser used to date and I've tried quite a few popular ones, so I respect your judgement on this stuff. :)