Block bug documentation

If the block-formatted content uses a named parameter (including Template:Para) and begins with a list (or any other wikimarkup that is dependent upon a specific markup character being at the beginning of a line), because MediaWiki behavior is to strip whitespace from named parameters, a Template:Xtag and a new line must exist before the list (or whatever) starts. This no longer affects unnamed parameters. Compare:

	code	result
Works as intended	Template:Tlx	Template:Error
FAIL	Template:Tlx	Template:Error
Works as intended	Template:Tlx	Template:Error

To embed a table in block markup like this, the block template's content parameter must be named or numbered and include the self-closing nowiki – as in |1=<nowiki /> – then every | character in the table markup must be escaped with Template:Tlx. An alternative is to use explicit HTML Template:Tag, Template:Tag, Template:Tag, and Template:Tag markup. Template:Documentation