code: def deparagraph(element, doc):
      
      if isinstance(element, Para):
          # Check if siblings exist; don't process the paragraph in that case.
          if element.next is not None:
              return element
          elif element.prev is not None:
              return element
  
          # Remove the Para wrapper from the lone paragraph.
          # `Plain` is a container that isn't rendered as a paragraph.
          return Plain(*element.content)
docs: Panflute filter function that converts content wrapped in a Para to
      Plain.
  
      Use this filter with pandoc as::
  
          pandoc [..] --filter=lsstprojectmeta-deparagraph
  
      Only lone paragraphs are affected. Para elements with siblings (like a
      second Para) are left unaffected.
  
      This filter is useful for processing strings like titles or author names so
      that the output isn't wrapped in paragraph tags. For example, without
      this filter, pandoc converts a string ``"The title"`` to
      ``<p>The title</p>`` in HTML. These ``<p>`` tags aren't useful if you
      intend to put the title text in ``<h1>`` tags using your own templating
      system.