Recompress a file, [K]eeping the .Z file if it is smaller than the .gz file

Recompress files from `.Z` to `.gz` format.
More information: <https://manned.org/znew>.
Trick copyright: tl;dr; <https://github.com/tldr-pages/tldr>

znew -K {{path/to/file1.Z}}

click the source code to copy install znew on any operating system with command-not-found.com