This reverts commit e4263daf76.
I'm reverting this commit in the sesion branch because it is breaking
the tests for R, as it no longer allows R source code blocks to return
scalar values. Hopefully this issue will be fixed in the master
branch before I merge the session branch back in.
I expect this will conflict with Eric's work on sessions, but we can deal with that.
There is a remaining quoting issue that needs to be dealt
with. E.g. with an unquoted string in the input, it comes out as
quoted in the result. This seems bad, since if you use the output as
new input you get something different (with extra
quoting). (non-idempotence if that's the right term).
| col1 | col2 | col3 |
|------+---------+------|
| 1 | 2 | 3 |
| 4 | schulte | 6 |
tabel
| "col1" | "col2" | "col3" |
|--------+-----------+--------|
| 1 | 2 | 3 |
| 4 | "schulte" | 6 |