feat: stage edits to published articles as drafts (#14842)

app/javascript/shared/helpers/MessageFormatter.js

@@ -67,8 +67,11 @@ const createMarkdownInstance = (linkify = true) => {
 // `<!--cw-colwidths:...-->` comment before the table. It exists only for the
 // editor's markdown round-trip and must never surface as text — markdown-it runs
 // with `html: false`, which would otherwise escape it into a visible comment in
-// rendered/plain output (e.g. dashboard search snippets). Strip it on the way in.
-const COLWIDTHS_MARKER_REGEX = /<!--cw-colwidths:[\d,]+-->\r?\n?/g;
+// rendered/plain output (e.g. dashboard search snippets). Strip the whole marker
+// line, including any blockquote prefix, so a quoted table's `>` prefixes don't
+// collapse together and break table parsing.
+const COLWIDTHS_MARKER_REGEX =
+  /^[ \t>]*<!--cw-colwidths:[\d,]+-->[ \t]*\r?\n?/gm;
 
 const TWITTER_USERNAME_REGEX = /(^|[^@\w])@(\w{1,15})\b/g;
 const TWITTER_USERNAME_REPLACEMENT = '$1[@$2](http://twitter.com/$2)';

app/javascript/shared/helpers/specs/MessageFormatter.spec.js

@@ -153,6 +153,15 @@ After`;
       expect(formatter.formattedMessage).not.toContain('cw-colwidths');
       expect(formatter.plainText).not.toContain('cw-colwidths');
     });
+
+    it('strips a blockquote-prefixed marker so the quoted table still renders', () => {
+      const message =
+        '> <!--cw-colwidths:120,200-->\n> | A | B |\n> | --- | --- |\n> | 1 | 2 |';
+      const { formattedMessage } = new MessageFormatter(message);
+      expect(formattedMessage).not.toContain('cw-colwidths');
+      expect(formattedMessage).toContain('<blockquote>');
+      expect(formattedMessage).toContain('<table>');
+    });
   });
 
   describe('#sanitize', () => {