I'd MUCH prefer people spend time writing tests for their code vs debating/arguing/refactoring code style. If your tests and good and coverage is high, there's far less chance I should ever even have to muck around inside your libraries, much less modify them.
And again, one doesn't preclude the other, but I see so many people making a bit stink over style - tabs vs spaces et al years before the PSR stuff - yet rarely do I see even 20% of that effort spent on getting people to test.
I say this not as someone who tests everything 100%, but as someone who doesn't do much of it, and understands the importance of it. When I'm deciding to use someone else's libraries, I never make a decision based on the code style they've chosen - I base it on maturity, documentation, and tests/examples provided (when there's a choice, sometimes you don't have a choice, or you roll your own). The really good libraries? I never even have to look a their code - it might be all run together on one line for all I care - it just works.