[m-rev.] for post-commit review: use color in more of simplify_*.m

[Julien Fischer]

On Sun, 12 May 2024, Zoltan Somogyi wrote:

> Use color in more of simplify_*.m.
> 
> compiler/simplify_goal.m:
> compiler/simplify_goal_call.m:
> compiler/simplify_goal_disj.m:
> compiler/simplify_goal_ite.m:
> compiler/simplify_proc.m:
>     Add color to the diagnostics generated by some of these modules,
>     and modify the existing color in other modules to use color_subject.
>
>     In a few cases, improve the wording of the diagnostic.

That looks fine.

Julien.