intro => join("\n",
'Resulting <a href="/unicode">selection</a> of <a href="/charset">Unicode</a> characters',
"while pressing ⌥ Option (Alt) with Apple's",
- 'ABC <em title="distinct from just ABC">Extended</a>',
+ 'ABC <em title="distinct from just ABC">Extended</em>',
"(formerly US Extended and Extended Roman) layout",
'on <abbr title="at least in Ventura 13.2">macOS</abbr>.',
'Significant changes from standard',