This is a cleanup diff; there are no changes in algorithms.

Estimated hours taken: 8
Branches: main

This is a cleanup diff; there are no changes in algorithms.

compiler/delay_info.m:
compiler/instmap.m:
compiler/inst_match.m:
compiler/inst_util.m:
compiler/make.module_target.m:
compiler/mode_errors.m:
compiler/modes.m:
compiler/mode_util.m:
compiler/process_util.m:
compiler/prog_io_goal.m:
compiler/prog_io.m:
compiler/prog_io_pragma.m:
compiler/prog_io_typeclass.m:
compiler/recompilation.check.m:
compiler/recompilation.m:
compiler/recompilation.usage.m:
compiler/recompilation.version.m:
compiler/unique_modes.m:
	Bring these modules up to date with our current style guidelines.
	Switch to predmode syntax and state variable notation where
	appropriate. Switch argument orders where this makes it possible
	to use state variable notation. Use the svmap and svset modules
	where appropriate. Fix inconsistent indentation; in some places,
	fix inconsistent placement of comments.

compiler/passes_aux.m:
compiler/modecheck_unify.m:
compiler/mercury_compile.m:
compiler/post_typecheck.m:
compiler/prog_io_dcg.m:
compiler/mode_ordering.m:
compiler/inst_graph.m:
compiler/polymorphism.m:
compiler/prog_io_util.m:
compiler/mode_debug.m:
compiler/mode_robdd.check.m:
compiler/transform.m:
	Minor changes to conform to the changed argument orders of some
	predicates in the cleaned up modules. Also, some minor cleanups.

compiler/prog_io_util.m

@@ -300,7 +300,7 @@ convert_mode(AllowConstrainedInstVar, Term, Mode) :-
 
 		Term = term__functor(term__atom("is"), [EqTerm, DetTerm], _),
 		EqTerm = term__functor(term__atom("="),
-					[FuncTerm, RetModeTerm], _),
+			[FuncTerm, RetModeTerm], _),
 		FuncTerm = term__functor(term__atom("func"), ArgModesTerms, _)
 	->
 		DetTerm = term__functor(term__atom(DetString), [], _),
@@ -360,7 +360,7 @@ convert_inst(AllowConstrainedInstVar, Term, Result) :-
 
 		Name = "is", Args0 = [EqTerm, DetTerm],
 		EqTerm = term__functor(term__atom("="),
-					[FuncTerm, RetModeTerm], _),
+			[FuncTerm, RetModeTerm], _),
 		FuncTerm = term__functor(term__atom("func"), ArgModesTerm, _)
 	->
 		DetTerm = term__functor(term__atom(DetString), [], _),
@@ -393,7 +393,7 @@ convert_inst(AllowConstrainedInstVar, Term, Result) :-
 		% Do not allow nested constrained_inst_vars.
 		convert_inst(no_allow_constrained_inst_var, InstTerm, Inst),
 		Result = constrained_inst_vars(set__make_singleton_set(
-				term__coerce_var(Var)), Inst)
+			term__coerce_var(Var)), Inst)
 	% anything else must be a user-defined inst
 	;
 		parse_qualified_term(Term, Term, "inst",