Say the card refusal holds only in a block written as an element

CHANGELOG.md

@@ -17,8 +17,9 @@
   `localId` as `data-local-id`. Every other node is an element of class `adf-carry` holding the
   node's JSON in `data-adf` and showing its content, links included. Every URL is written as the
   ADF holds it, `javascript:` included: sanitize HTML from an author you do not trust before
-  showing it. `adfToHtml` refuses an inline card a link marks, as `unsupported-node-shape`: Atlassian's schema gives a
-  card no link mark, and HTML nests no link in a link.
+  showing it. `adfToHtml` refuses an inline card a link marks, in a block written as an element, as
+  `unsupported-node-shape`: Atlassian's schema gives a card no link mark, and HTML nests no link in
+  a link.
 - `htmlToAdf` reads `adfToHtml`'s HTML back to the document it came from, a carry element from its
   `data-adf`. It reads that HTML as a browser's `innerHTML` writes it too (a raw `"` in text,
   `&nbsp;`, a raw `<` or `>` in an attribute value) and as a form post sends it (`\r\n` for each

README.md

@@ -526,7 +526,7 @@ content. No stylesheet ships. The complete dialect:
 | `rule` | `<hr>` |
 | `text` marked `code`, `em`, `strong` | `<code>`, `<em>`, `<strong>`, the first mark outermost |
 | an attribute its type holds that its element does not write, such as `localId`, on a paragraph, heading, quote, list, list item, code block, rule, emoji, mention, status, date or card | `data-*` named as HTML's `dataset` names it: `<p data-local-id="a1f3">` |
-| any other node, or a node holding what its element cannot, except an inline card a link marks, which is refused | `<div class="adf-carry" data-adf="{…}"><p>its content</p></div>`, a `<span>` inline |
+| any other node, or a node holding what its element cannot, except an inline card a link marks in a block written as an element, which is refused | `<div class="adf-carry" data-adf="{…}"><p>its content</p></div>`, a `<span>` inline |
 
 - Every URL is written as the ADF holds it, `javascript:` included: a link's, an image's, a
   card's, and a carried link's in the carry element. Sanitize the HTML before showing a document from
@@ -646,8 +646,9 @@ Every call can raise these:
   twice, a block or a non-text inline node holding `text`, or a leaf block or a non-text inline node
   holding `content`. Keep the ADF and show the document read-only; where you built the ADF, fix
   what the message names.
-- **Writing, in `adfToHtml`**: an inline card marked by a link: Atlassian's schema gives a card no
-  link mark, and HTML nests no link in a link. Keep the ADF and show the document read-only; where
+- **Writing, in `adfToHtml`**: an inline card marked by a link, in a block written as an element
+  (in a carried block it rides the carry): Atlassian's schema gives a card no link mark, and HTML
+  nests no link in a link. Keep the ADF and show the document read-only; where
   you built the ADF, remove the link mark from the card the error's `path` names.
 - **Writing, in `adfToPortableMarkdown`**: a line or task list the portable writer cannot spell.
   This is a bug in this library: report it.

spec/html.md

@@ -107,9 +107,9 @@ later release writes it as its own element.
   - Characters HTML cannot hold are dropped.
 - A node rides the carry where it holds a mark or a key its element does not write, an attribute
   its type does not hold as that kind, an empty `attrs`, `content` or `marks`, or a value its
-  element cannot hold. The exception is an inline card a link marks, which `adfToHtml` refuses as
-  `unsupported-node-shape`: Atlassian's schema gives a card no link mark, and HTML nests no link in
-  a link.
+  element cannot hold. The exception is an inline card a link marks, in a block written as an element:
+  `adfToHtml` refuses it as `unsupported-node-shape`, since Atlassian's schema gives a card no link
+  mark and HTML nests no link in a link. In a carried block it rides the carry.
   - text holding no character, or a character HTML cannot hold; text holding a mark twice, or a
     mark with attributes besides a link's `href` and `title`;
   - an unmarked text node straight after one written as plain text, which would read back as one;