Incorrect execution in literate mode

This code in literate mode interprets `; @` as save-op instead of referencing `;@`:

`. , ;4 ~~ $ ; @ $`

produces
```
1 4 4
2 4 4
3 4 4
4 4 4
```

Compilation converts this to `;@` and produces:

```
1  1
2  2
3  3
4  4
```