Refactor routing in App component to enhance navigation and improve error handling by integrating dynamic routes and updating the NotFound route.

node_modules/mdast-util-to-markdown/lib/util/check-quote.js

@@ -0,0 +1,21 @@
+/**
+ * @import {Options, State} from 'mdast-util-to-markdown'
+ */
+
+/**
+ * @param {State} state
+ * @returns {Exclude<Options['quote'], null | undefined>}
+ */
+export function checkQuote(state) {
+  const marker = state.options.quote || '"'
+
+  if (marker !== '"' && marker !== "'") {
+    throw new Error(
+      'Cannot serialize title with `' +
+        marker +
+        '` for `options.quote`, expected `"`, or `\'`'
+    )
+  }
+
+  return marker
+}