bug#61396: diff mode could distinguish changed from deleted lines

[Dmitry Gutov]

On 12/02/2023 03:07, Samuel Wales wrote:
> i do not understand your response.  where is this option?  what does
> it do for diff-mode?  thanks.

It's in diff-mode.el. You can always find the exact place of definition 
from the Customize interface.

> i feel this thread is going all over the place without addressing the
> op.  is the op difficult to understand?  i tried my best.

This is the feature which colors "FOR ALL GOOD MEN" from your example 
with a different background. It's enabled by default.