source code is not just for machines to read, it is (usually) also to be read by humans.
Exactly, so all things being equal, in terms of resulting code, you write the way you are comfortable with. Those of us that code professionally have coding standards to adhere to, for that reason. People that code for a hobby, and have no others regularly collaborating on the code, can write how they like.
The other thing is that you get more precision in terms of expression; you can choose to use either x++ or ++x an the increment operator, and the difference can often be exploited to write code that is concise, powerful, and even elegant.
In the line of code being discussed, this is entirely irrelevant.