Nothing states that select/option are replaced elements

[domenic]

https://html.spec.whatwg.org/#replaced-elements says

The following elements can be replaced elements: audio, canvas, embed, iframe, img, input, object, and video.

and gives details on each of them.

It's followed by https://html.spec.whatwg.org/#widgets which says

The elements defined in this section can be rendered in a variety of manners, within the guidelines provided below. User agents are encouraged to set the 'appearance' CSS property appropriately to achieve platform-native appearances for widgets, and are expected to implement any relevant animations, etc, that are appropriate for the platform.

which is not quite the definition of replaced elements.

However @tabatkins assures me that these should be replaced elements. (Should they also be widgets?)

This might be a dupe of #2359.

/cc @zcorpan