Automatically create question tag if one isn't yet opened

inst/header.lua

@@ -25,17 +25,17 @@ end
 function Pandoc(doc)
   local hblocks = {}
   local category_idx = 0
-  local in_category = false
+  local in_question = false
   for i,el in pairs(doc.blocks) do
     if (el.t ~= "Header" or el.level > 2 or el.classes[1] == "header") then
-      if (not in_category) then
+      -- If a question div hasn't yet been opened, create one.
+      if (not in_question) then
+        in_question = true
         category_idx = category_idx + 1
-        table.insert(hblocks, el)
-      else
-        hblocks[category_idx].content:insert(el)
+        table.insert(hblocks, process_header(pandoc.Header(2, 'Unnamed question', pandoc.Attr())))
       end
+      hblocks[category_idx].content:insert(el)
     elseif (el.t == "Header") then
-      in_category = true
       category_idx = category_idx + 1
       table.insert(hblocks, process_header(el))
     end