packages feed

pandoc-2.15: test/command/3257.md

```
% pandoc -t native
(i<j)
^D
[ Para [ Str "(i<j)" ] ]
```

```
% pandoc -t native
i<j-1, j>k
^D
[ Para [ Str "i<j-1," , Space , Str "j>k" ] ]
```