`click.progressbar` doesn't show full completion when using `show_pos=True` combined with `update_min_steps`

[maarten-ic]

Using a click.progressbar with:

• update_min_steps which isn't a divisor of length
• show_pos=True

won't show full completion at the end. This can be reproduced as follows:

import time

import click

with click.progressbar(
    range(20),
    show_pos=True,
    update_min_steps=7,
) as bar:
    for i in bar:
        time.sleep(0.1)

with (final) output in the terminal

  [####################################]  14/20          

Expected behaviour: I had expected the output to show 20/20 at the end.
This would be consistent with the default percentage formatting, as can be seen by commenting the line show_pos=True and re-running the reproduction:

  [####################################]  100%          

Environment:

• Python version: tested with 3.12.3 and 3.14.3
• Click version: 8.4.1