Whitespace and newline handling

## Newlines in paragraphs

This is a paragraph with newlines between sentences. Browsers collapse these to spaces.

This paragraph has multiple blank lines that should also collapse to spaces.

## Whitespace-preserving code

`/ip address add address=192.168.88.1/24 interface=bridge1 add address=172.16.0.1/24 interface=ether1`

The code above uses white-space: pre on a code element without a pre wrapper.

    This is a normal pre+code block.
    It should be preserved as-is.
      Including indentation.