and new line to version message

[tansy]

As there is no new line at the end of version message it mixes up with command prompt like this:

$ zstd-mt -V
 zstd-mt using libzstdmt v0.8, using zstd v1.5.6
 Copyright (c) 2016 - 2024 Tino Reichardtuser@host: ~/ $

To prevent it '\n' is added.

[mcmilk]

What about adding "\n" in the end of the two lines?

[tansy]

I thought it was your style, like in usage(), @L158.