>>512633105
>>512635008

The essence of the "reddit spacing" meme is that you can't know what it really means if you weren't on 4chan prior to 2016 (and the migration of r/the_donald redditors that gave birth to it)
It doesn't mean double spacing.
It means a space after the reply link (like I just did) because they didn't lurk before posting and therefore made a very simple formatting mistake.