format_to_post() trouble inserting post content

I’m trying to include the content of another post
I’m having trouble ??

The code I have is

$post_object = get_post(10);
// 10 being the the post ID

$post_properly_formatted = '<p>'.format_to_post($post_object->post_content).'</p>';

I looked at a plugin that inserts posts anywhere you want
I saw that they used the function format_to_post() and they surrounded the content with <p> tags – so I did the same

Problem: I’m getting the post content, but it the formatting is incorrect – I am not getting carriage returns ??

I assume that WP does some formatting somewhere before giving post content

I assumed this is what the function format_to_post() would do for me?

It doesn’t seem to have any effect at all

And there doesn’t seem to be any text guide on the function – nothing is really said on its page

Help! Where am I going wrong?

Thanks

Omar