Extra newlines are inserted around constants with dslx-fmt::off

[dplassgit]

To Reproduce

Try to format:

const foo = u32:42;
// dslx-fmt::off
const bar = u32:43;
const baz = u32:44;
// dslx-fmt::on
const qux = u32:45;

Expected behavior
Output=input

Actual behavior

const foo = u32:42;

// dslx-fmt::off
const bar = u32:43;
const baz = u32:44;
// dslx-fmt::on

const qux = u32:45;

[dplassgit]

Also happens when there's only one const inside the disabled section.