> added random blank lines and deleted others from code that was not even in the file they were supposed to be working in.

Maybe some kind of auto-formatter?

That is my charitable interpretation, but it's always one or two changes across a module that has hundreds, maybe thousands of lines of code. I'd expect an auto-formatter to be more obvious.

In any case, just looking over your own PR briefly before submitting it catches these quickly. The lack of attention to detail is the part I find more frustrating than the actual unnecessary format changes.