I agree we ought have some simple wikitext for this. You can use  
which will create a space four space characters wide. E.g use it like so:  Indented as intended. <:-) -- You received this message because you are subscribed to the Google Groups "TiddlyWiki" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/tiddlywiki/22095d42-9b81-4eee-add5-f4b8f7b8fcebo%40googlegroups.com.
