[m-rev.] for post-commit review: fix mantis bug #551

[Julien Fischer]

On Mon, 21 Feb 2022, Zoltan Somogyi wrote:

> Don't mention nonexistent pragmas in error msgs.
> 
> This should fix Mantis bug #551.
> 
> compiler/table_gen.m:
>     Don't refer to ignoring "table_io" pragmas, since they do not exist.
>     Instead, explain why, when debugging is enabled, predicates that do I/O
>     would normally be tabled.
>
>     In situations in which we would need to ignore the minimal model
>     tabling method, which needs to be consistent for all procedures
>     for it to work, make the messages severity_error, not the original
>     severity_informational.
>
>     Factor out some common code.

That's fine -- thanks for that.

Julien.