Consistency is the main point. The second layout is more compact and this makes a huge difference if you need to put code in a document (also a small difference

Consistency is the main point. The second layout is more compact and this makes a huge difference if you need to put code in a document (also a small difference for websites). Having more compact code allows to have more code on the screen without using the scrollbar. For me, it is also more readable because I am used to it.