Add newly-supported elements to docblock, fix typo in tests.

src/wp-includes/html-api/class-wp-html-processor.php

@@ -100,15 +100,18 @@
  * The following list specifies the HTML tags that _are_ supported:
  *
  *  - Containers: ADDRESS, BLOCKQUOTE, DETAILS, DIALOG, DIV, FOOTER, HEADER, MAIN, MENU, SPAN, SUMMARY.
- *  - Form elements: BUTTON, FIELDSET, SEARCH.
+ *  - Form elements: BUTTON, DATALIST, FIELDSET, LABEL, LEGEND, METER, PROGRESS, SEARCH.
  *  - Formatting elements: B, BIG, CODE, EM, FONT, I, SMALL, STRIKE, STRONG, TT, U.
  *  - Heading elements: H1, H2, H3, H4, H5, H6, HGROUP.
  *  - Links: A.
  *  - Lists: DL.
- *  - Media elements: FIGCAPTION, FIGURE, IMG.
+ *  - Media elements: AUDIO, CANVAS, FIGCAPTION, FIGURE, IMG, MAP, PICTURE, VIDEO.
  *  - Paragraph: P.
+ *  - Phrasing elements: ABBR, BDI, BDO, CITE, DATA, DEL, DFN, INS, MARK, OUTPUT, Q, SAMP, SUB, SUP, TIME, VAR
  *  - Sectioning elements: ARTICLE, ASIDE, NAV, SECTION
- *  - Deprecated elements: CENTER, DIR
+ *  - Templating elements: SLOT
+ *  - Text decoration: RUBY
+ *  - Deprecated elements: ACRONYM, BLINK, CENTER, DIR, ISINDEX, MULTICOL, NEXTID, SPACER
  *
  * ### Supported markup
  *

tests/phpunit/tests/html-api/wpHtmlProcessorBreadcrumbs.php

@@ -55,7 +55,7 @@ public function data_single_tag_of_supported_elements() {
 			'CODE',
 			'DATA',
 			'DATALIST',
-			'DEFN',
+			'DFN',
 			'DEL',
 			'DETAILS',
 			'DIALOG',