reddit's code formatting is its own story, it supports both 4 spaces and triple backticks (but only on redesign web).

> On redesign, a slightly-edited version of CommonMark. On old reddit, it's still snudown.

(and mobile apps have their own markdown)

> New Reddit note: Indented code blocks are the only form of code block that works on Old Reddit. Use them for compatibility

https://www.reddit.com/wiki/markdown#wiki_code_blocks_and_in...

maybe in a few years there is going to be syntax highlighting, one can hope :) (slack doesn't have it either, but even discord has it...)