Fixes #8310. Make sure that sibling selectors (+,~) in some edge case…

…s don't leave modification behind in the DOM.

Follow up to 8b34687 which caused Sizzle to sometimes
leave modifications behind in the DOM and remove the id attribute on the wrong element.

Fixes #8310. Make sure that sibling selectors (+,~) in some edge case…

…s don't leave modification behind in the DOM.

Follow up to 8b34687 which caused Sizzle to sometimes
leave modifications behind in the DOM and remove the id attribute on the wrong element.

Fix the handling of escaped attribute names/values for non qSA browse…

…rs. Fixes #3729. Fixes #6428.

Fix jslint failures caused by aa6076c.