Let's make Apex test coverage easier.
Front end developers can minify their code into a single line.
Apex developers need to write test coverage on a per-line basis.
So why not write coverage for just 1 line of code?
Ok, so you've clicked Minify, which means we need to have a serious conversation. Minifying Apex isn't a great idea. If you intend to use this in production, it's quite likely that you will end up with a headache when you try to change your code (if you forget there's a Prettify button on this site).
There's a better way to approach Apex test coverage. You can write your tests first, which is truly Test Driven Development (TDD, learn more here), or write your tests in a meaningful way. If you've never written tests before, check out Trailhead to get up to speed.