I think plain text is OK. There is also Markdown, MediaWiki format, etc, although a simple readable format is best, so that includes plain text (and possibly Ma

I think plain text is OK. There is also Markdown, MediaWiki format, etc, although a simple readable format is best, so that includes plain text (and possibly Markdown too). And even if another format is made, we should avoid the mistakes of HTML, such as scripting and styling and some other stuff.