[m-rev.] for post-commit review: delay reporting missing parent imports

[Zoltan Somogyi]

On Mon, 12 May 2025 21:26:35 +1000 (AEST), "Zoltan Somogyi" <zoltan.somogyi at runbox.com> wrote:
> For review by anyone.

The diff, and the commit, were made without writing out my last changes
to comments in prog_parse_tree.m. I have now committed them.

Zoltan.