let functions rewrite to invalid syntax

[Francesco Giannelli]

let hello() = begin
        print("ok")
    end
    hello()
end

let hello() = print("ok");
    hello()
end

get rewritten to

let function hello()
        print(
            "ok",
        )
    end
    hello()
end

config

style="blue"
margin=10
always_use_return=false
remove_extra_newlines=true
overwrite=false
pipe_to_function_call=false