Fix up some of the new formatting stuff

src-web/lib/formatters.ts

@@ -5,7 +5,24 @@ const INDENT = '  ';
 
 export async function tryFormatJson(text: string): Promise<string> {
   if (text === '') return text;
-  return invokeCmd('cmd_format_json', { text });
+
+  try {
+    const result = await invokeCmd<string>('cmd_format_json', { text });
+    return result;
+    // eslint-disable-next-line @typescript-eslint/no-unused-vars
+  } catch (err) {
+    console.warn("Failed to format JSON", err);
+    // Nothing
+  }
+
+  try {
+    return JSON.stringify(JSON.parse(text), null, 2);
+    // eslint-disable-next-line @typescript-eslint/no-unused-vars
+  } catch (err) {
+    // Nothing
+  }
+
+  return text;
 }
 
 export async function tryFormatXml(text: string): Promise<string> {