anchor.diff:  \setlength{\headheight}{14\RtRelPt}
   \newcommand{\RtDoubleHRule}{
     \begin{minipage}{\textwidth}
  -  \hrule width \hsize height 0.2\RtRelPt
  +  \hrule width \hsize height 0.19\RtRelPt
     \kern 1.6\RtRelPt
  -  \hrule width \hsize height 0.2\RtRelPt
  +  \hrule width \hsize height 0.19\RtRelPt
     \end{minipage}
   }
   \newcommand{\RtFooterContent}{
  
positive.code:     \renewcommand{\headrulewidth}{0mm}
      % no line in footer (default)
    <% end %>
    \fancyhead[EL,OR]{<%= @page_number_command %>} % outside
    \fancyhead[ER]{<%= @header_text %>} % inside even
    \fancyhead[OL]{<%= @header_title %>} % inside odd
    \RtFooterContent
  
negative.code:   }
    {
      \end{spacing}
      \vspace*{<%= @title_vspace %>\RtRelPt}
      \end{center}
    }
  % avoid widows and orphans
  