Wrong diff highlighting for "no newline at end of file"

[knuesel]

When a file without newline at the end is "fixed" by adding a newline, the diff view shows the message "\ No newline at end of file" in green:

This is a bit misleading, it suggests that the change was to remove the newline rather than add it.

For comparison here's how it looks with the default git diff:

(tested on gitui 0.26.1)