> If I add fill=TRUE to that (on a git branch), then I get this:
>
> #+RESULTS: pascals-triangle
> | 1 |   |    |    |   |   |
> | 1 | 1 |    |    |   |   |
> | 1 | 2 |  1 |    |   |   |
> | 1 | 3 |  3 |  1 |   |   |
> | 1 | 4 |  6 |  4 | 1 |   |
> | 1 | 5 | 10 | 10 | 5 | 1 |
>
> #+NAME: sanity-check
> #+HEADER: :var sc_input=pascals-triangle
> #+BEGIN_SRC R
> sc_input
> #+END_SRC
> #+RESULTS: sanity-check
>
> | 1 | nil | nil | nil | nil |
> | 1 |   1 | nil | nil | nil |
> | 1 |   2 |   1 | nil | nil |
> | 1 |   3 |   3 | 1   | nil |
> | 1 |   4 |   6 | 4   | 1   |
> | 1 |   5 |  10 | 10  | 5   |
> | 1 | nil | nil | nil | nil |
>
> which isn't correct, but gets past the scan error.
>

Hmm, this happens with my patch applied as well.  It seems to me this
*must* be an R error.  The raw textual data pre-import has no such wrap.