Whenever quoting code, even code that is meant to be replaced, the code block has an active Copy button. While you could make an argument that a reader might use the Copy button to prepare to paste the text into a search box, it’s far likelier in practice that the reader will copy the wrong code. This occasionally happens to me after a couple of hours of reading, and then I’m confused when the resulting code doesn’t behave. I wind up diffing my project directory against the final directory and trying to sort out what I missed. I’d suggest disabling the Copy button for reference code that we’re not adding to the project so that if I want to search on it, I have to select it and manually copy it.