fix: playground edit message

src/components/markdown-viewer/utils.ts

@@ -0,0 +1,16 @@
+const htmlUnescapes: Record<string, string> = {
+  '&amp;': '&',
+  '&lt;': '<',
+  '&gt;': '>',
+  '&quot;': '"',
+  '&#39;': "'"
+};
+
+const reEscapedHtml = /&(?:amp|lt|gt|quot|#(?:0+)?39);/g;
+const reHasEscapedHtml = RegExp(reEscapedHtml.source);
+
+export const unescape = (str = '') => {
+  return reHasEscapedHtml.test(str)
+    ? str.replace(reEscapedHtml, (entity) => htmlUnescapes[entity] || "'")
+    : str;
+};