~~ forStatement.singleBodyPosition: maintain ~~
== should keep on a single line ==
for (let i = 0; i < 5; i++) a;

[expect]
for (let i = 0; i < 5; i++) a;

== should keep on the next line ==
for (let i = 0; i < 5; i++)
    a;

[expect]
for (let i = 0; i < 5; i++) {
    a;
}
