For future reference
From User talk:PeterL/LQT
I am a minimalist sometimes, Mr Two-spaces. :P
I use extra spaces everywhere when editing to help me differentiate between different chunks of wikicode (including where one sentence ends and another begins). I wish I could hit "enter" for a line break after every reference tag, too, so I didn't have to squint to differentiate references from the rest of the text anymore, but that gets rendered as spaces before and between references.
It makes sense to use single-quotes for scarequotes or titles.