<{system cat src/pages/parts/header.etlua}>
<% if errcode then -%><%= errcode -%><% end -%>:
<% if errcodemsg then -%><%= errcodemsg -%><% end %>
<% if explanation then -%><%= explanation -%><% end -%>
<% if should_traceback then %>
<%- debug.traceback() %>