I recently answered a question on this site. A few hours later it was edited in various ways, all of them at the level of minor proof-text amendments. I was relaxed about the result of the edits, but some of the changes were to the way I had referenced specific Bible verses. For example, suppose the text was the first verse of John's gospel. I would have put John 1.1, which is how I've quoted biblical texts for years. The editor would have changed this to John 1:1 (from the full stop to the colon).
As I say, it's a very minor issue for that particular answer, but it raised for me the more general question about citation conventions. Are there any? How important is this? If it is important, where are the conventions located, and how are they communicated to newcomers? (I'm asking these questions because the more I understand, the better I can contribute and the less time other people need to spend changing things.)
Edit: Here's the link to the related Q&A.