[edbrowse-dev] unsupported selector [s!='']:x intentional

[Kevin Carhart]

FYI, in case you notice the following unsupported selector turning up in 
debug output:
querySelectorAll([s!='']:x): : unsupported

I just discovered that this is intentional.  It is called from an assert() 
routine in some versions of jquery:

// This should fail with an exception
// Gecko does not error, returns false instead
matches.call( div, "[s!='']:x" );

So that's something that looks on the surface like an error but we don't 
have to try to fix it.

Kevin