Last part of the screenshot is duplicated

[agsoto]

Bug description
There's a tiny miscalculation when pasting the last part of the image when the last remaining step of the scroll does not fit the entire viewport.

To Reproduce
Steps to reproduce the behavior:

1. Create a instance of the Screenshot class
2. Call the full_screenshot method setting the multi_images flag to true
3. See the resulting image

Expected behavior
The image should not have repeated parts it should be visualized as the regular webpage in the browser.

Screenshot

Desktop

• OS: Windows 11
• Browser: Chromium

[chxlium]

Hello, it´s still happening to me when the page is long and I need to scroll down