`pre/code`s inside `blockQuote`s don't render the `copy-cmd` `button`

Bug
1

Whereas /pre/code/ produces:

<button class="btn nohighlight copy-cmd btn-flat" aria-label="copy code to clipboard"><svg class="fa d-icon d-icon-copy svg-icon svg-string" aria-hidden="true" xmlns="http://www.w3.org/2000/svg"><use href="#copy"></use></svg></button>

/blockQuote/pre/code/ does not:

Context