Use global function to check if caption if empty

Author: tarleb

src/resources/filters/ast/customnodes.lua

@@ -343,6 +343,12 @@ _quarto.ast = {
         end
         local inner_node = node.content[index]
         local innertype = pandoc.utils.type(inner_node)
+        if key == 'caption_long' then
+          io.stderr:write('Setting caption_long: ' .. tostring(value) ..'\n')
+          if type(value) == 'userdata' then
+            io.stderr:write(debug.traceback())
+          end
+        end
         if innertype == 'Block' then
           inner_node.content = quarto.utils.as_blocks(value)
         elseif innertype == 'Inline' then

src/resources/filters/layout/typst.lua

@@ -11,7 +11,7 @@ function make_typst_figure(tbl)
   local identifier = tbl.identifier
   local separator = tbl.separator
 
-  if (not caption or #caption.content == 0) and tbl.separator == nil then
+  if _quarto.utils.is_empty_node(caption) and tbl.separator == nil then
     separator = ""
   end