Bug #7533. Fix for IDs which contain CSS3 selector meta characters

[jitter]

This should fix various bugs when we try to select by ID but the ID contains CSS 3 selector meta characters and thus confuses qSA when not escaped.

Please double check if I missed some in the regex.

[jeresig]

Why not just do [id='THEID'] (escaping ', naturally)? Seems like it would make the code simpler, at least.

[jitter]

you mean like this?
...
else {
nid = nid.replace( /'/g, "$&" );
}
....
context.querySelectorAll( "[id='" + nid + "'] " + query )

This sure looks simpler. Hopefully browsers didn't just optimize for the #id syntax.

I can make a new pull request with this solution if you want.

[jeresig]

Yep - like that! Also, we keep if/else braces on the same line. Thanks!