It's there in the source where it happens.
Firefox doesn't display it, but it shows up in the debugger. WebKit/Blink don't show it in the debugger (see
here).
If you throw it in a validator, you get:
Code:
Warning: Saw a control character: U+0099.
After looking it up I'm still not really sure what this Single Graphic Character Introducer (hence SGCI in my screenshot) was ever supposed to do, except that it's some super ancient failed thing.
http://unicode.org/mail-arch/unicode...-m10/0050.html
https://www.unicode.org/L2/L2011/112...ol-aliases.txt
Quote:
0080 PADDING CHARACTER (PAD)
0081 HIGH OCTET PRESET (HOP)
0099 SINGLE GRAPHIC CHARACTER INTRODUCER (SGC)
Those 3 were proposed (on spec) in early drafts of 10646, for what became
a failed architectural direction for 10646. They would be completely forgotten
now except for the persistent (and pernicious) RFC that lists them without
indicating their failed status. Nobody has ever implemented them, so they
are nothing more than character encoding curiosities.
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So it seems the correct thing to do would be to ignore these for display, but I remain confused with regard to the presence of these obsolete things from the early to mid '90s.