[m-rev.] [PATCH] Fix writing of coerce casts in .opt files.

[Peter Wang]

On Wed, 16 Feb 2022 16:13:16 +1100 Peter Wang <novalazy at gmail.com> wrote:
> This also belongs on the release branch.
> ----
> 
> We inadventently wrote out 'coerce' casts in .opt files as:
> 
>     V_2 = 'coerce expression'(V_3).
> 
> In commit 233874403fc1cdd70b8c92b121a07335f6c5436f, cast_type_to_string
> was changed to return "coerce expression" instead of simply "coerce"
> for a slight improvement in mode errors.
> 
> compiler/hlds_out_goal.m:
>     Don't use the result of cast_type_to_string when when writing out
>     coerce casts.
> 
> tests/hard_coded/Mercury.options:
> tests/hard_coded/Mmakefile:
> tests/hard_coded/coerce_opt.exp:
> tests/hard_coded/coerce_opt.m:
> tests/hard_coded/coerce_opt_2.m:
>     Add test case.

Sorry, I forgot to add "for review" to the subject.

Peter