anchor.diff:            \textcolor[gray]{0.5}{No Signature}
             \vspace{2 mm}
           <% end %>
  -      <% elsif sheet_variable.get_response(@sheet.project.show_type).blank? %>
  +      <% elsif !sheet_variable or (sheet_variable and sheet_variable.get_response(@sheet.project.show_type).blank?) %>
           \vspace{1 mm}
           \textcolor[gray]{0.5}{Unknown}
           \vspace{2 mm}
         <% else %>
           \vspace{1 mm}
  -        <%= latex_safe sheet_variable.get_response(@sheet.project.show_type) %>
  +        <%= latex_safe(sheet_variable.get_response(@sheet.project.show_type)) if sheet_variable %>
           \vspace{2 mm}
         <% end %>
   
  
positive.code:       \begin{addmargin}[0em]{0em}\textbf{<%= latex_safe variable.display_name %>}\end{addmargin}
  
        <% if variable.variable_type == 'checkbox' %>
          <% if sheet_variable.get_response(@sheet.project.show_type).size == 0 %>
            \vspace{1 mm}
            \textcolor[gray]{0.5}{Unknown}
            \vspace{2 mm}
  
negative.code: 
          <% else %>
            \vspace{1 mm}
            <%= latex_safe(sheet_variable.get_response(@sheet.project.show_type)) if sheet_variable %>
            \vspace{2 mm}
          <% end %>
        <% elsif variable.variable_type == 'signature' %>
  