s:349:"Format to use for warning and error text output.
; plaintext: Wikitext with HTML tags removed and entities replaced.
; wikitext: Unparsed wikitext.
; html: HTML.
; raw: Message key and parameters.
; none: No text output, only the error codes.
; bc: Format used prior to MediaWiki 1.29. <var>errorlang</var> and <var>errorsuselocal</var> are ignored.";