"If the byte at encodingPosition is not 0x3D (=)..."

[JKingweb]

https://html.spec.whatwg.org/multipage/parsing.html#concept-get-xml-encoding-when-sniffing

7. If the byte at encodingPosition is not 0x3D (=), then return failure.

8. While the byte at encodingPosition is less than or equal to 0x20 (i.e., it is either an ASCII space or control character), advance encodingPosition to the next byte.

9. Let quoteMark be the byte at encodingPosition.

This never advances encodingPosition past the = byte, meaning that quoteMark can never be a quotation mark. Step 7 should probably read something like:

7. If the byte at encodingPosition is 0x3D (=), then advance encodingPosition to the next byte. Otherwise, return failure.

[annevk]

@hsivonen can you fix this?

[hsivonen]

I'll fix this.