Indicate clipboard content has multiple lines in indicator

I have a feature request:

I would like to see the number of lines each copy+paste snippet inside diodon has.

Example:

One item contains an entire python file:

{{{
# -*- coding: utf-8 -*-
from __future__ import absolute_import, division, unicode_literals, print_function

import codecs
import inspect
import os
import random
import re
import shutil
... many lines following
}}}

The other contains just the first two lines:
{{{
# -*- coding: utf-8 -*-
from __future__ import absolute_import, division, unicode_literals, print_function
}}}

My use case: I want to insert the two-line snippet, not the big snippet. But the preview for both looks the same.

Can you understand my issue?

Is there a way to fix this?