You cannot _create_ lists ending with a comma, however. I propose a 'type' inlet in [text set] and [text insert], just for completeness and consistency.
[11 12 13( [2( [1( <- type | / / [text insert ]
with above text buffer example would create:
1 2 3, foo bar baz, 11 12 13, 5 6 7;
Roman
This sounds reasonable! Also, we could add a "type" outlet to [text size], so I can know the type of a "line" without actually outputting its content. Maybe also for [text sequence].
Sorry again for the confusion. At least I could help you resolve your original issue :-)