Changes
separate unprintworthiness from actual self-reference - not the same thing
{{#switch:{{{2|NONE}}}
|NONE|hatnote|hat={{Hatnote|1=<span class="plainlinks selfreference">{{{1}}}</span>}}
|inline=<span class="plainlinks selfreference" style="font-style: italic;">{{{1}}}</span>|unprintworthy|<!--empty-->=<span class="plainlinks selfreference" style="font-style: italic;">{{{1}}}</span>|#default={{error|Second parameter must be <code>hatnote</code>, <code>hat</code>, <code>inline</code>, or <code>inlineunprintworthy</code>}}
}}<!--
* Note: matching the empty string for inline is for backwards compatibility with the 2006-2008 version