Because one format is not good enough.
We might be able to use jverkoey/NSAttributedStringMarkdownParser to parse the Markdown into an NSAttributedString and then use that.
Pseudo-code:
NSAttributedStringMarkdownParser *parser = [[NSAttributedStringMarkdownParser alloc] init];
NSAttributedString *body = [parser attributedStringFromMarkdownString:theComment.body];
self.bodyTextView.attributedText = body;
/cc @gothma