Prism misparses section docs with separator

[Earlopain]

This code from https://github.com/ruby/prism/blob/7414a8c53ef3b03fae10b601834ce40965e1c1e9/templates/lib/prism/node.rb.erb#L457-L461

    # ----------------------------------------------------------------------------------
    # :section: Node Interface
    # These methods are present on all subclasses of Node.
    # Read the [node interface docs](rdoc-ref:Node@node-interface) for more information.
    # ----------------------------------------------------------------------------------

currently gets correctly rendered like this:

However on main which uses prism instead of ripper I get the following:

It keeps the separator and drops the last line. I tried it with only using a single line like

    # --------------------------------------------------------------------------
    # :section: Node Interface
    # FooBar
    # --------------------------------------------------------------------------

and it also keeps the separator. It also interprets it as a heading like markdown: