fix(agenda): correctly re-render agenda on repeated todo state changed

In Emacs Orgmode, toggling todo state of a headline in agenda leaves the
headline visible in agenda until the next re-render. We do the same, but
only for headlines that do not add new lines to the file content. If it
adds new lines, we need to re-read the file and re-render the agenda
because the locations of other headlines can be stale and invalid.
We had this fix in place for some time now, but it got moved in some of
the refactorings and check was failing.

Author: kristijanhusak

lua/orgmode/agenda/init.lua

@@ -578,15 +578,15 @@ function Agenda:_remote_edit(opts)
   if not headline then
     return
   end
+  local old_range = headline:get_range()
+
   local update = headline.file:update(function(_)
     vim.fn.cursor({ headline:get_range().start_line, 1 })
     return Promise.resolve(require('orgmode').action(action)):next(function()
       return self.files:get_closest_headline_or_nil()
     end)
   end)
 
-  local old_range = headline:get_range()
-
   update:next(function(updated_headline)
     ---@cast updated_headline OrgHeadline
     if opts.redo then