Bug#872033: apt edit-sources: missing newline at the end of "file changed, please run 'apt-get update'."

[Jean-Ralph Aviles]

This has been fixed in merge !22 
<https://salsa.debian.org/apt-team/apt/commit/1ff389a5053e9ece91db8199afdcec16090a76b0>
 on the apt Gitlab <https://salsa.debian.org/apt-team/apt/> instance.