docs: def metainfo( self, mydict ):
          """This convenience function is only useful for html.
          It adds meta information via the <meta> element, the argument is
          a dictionary of the form { 'name':'content' }."""
  
          if isinstance( mydict, dict ):
              for name, content in list( mydict.items( ) ):
                  self.meta( name=name, content=content )
          else:
              raise TypeError( "Metainfo should be called with a dictionary argument of name:content pairs." )