Auto-indent doesn't work when entering new line on the line preceeding the indented scope

[aeris170]

Current behavior:

if (condition) { // <---- press Enter here
| //<---- where your cursor will be
    some_code();
    type variable_name = some_more_code();
}

What it "should" be:

if (condition) { // <---- press Enter here
    | //<---- where your cursor will be
    some_code();
    type variable_name = some_more_code();
}

I'm opening a PR to fix this. Please review when convenient.