Add sentinels to verify which file GitHub Pages serves

simbo1905 · simbo1905 · commit 7c8379cc8fb9 · 2025-07-25T15:43:16.000+01:00
diff --git a/README.md b/README.md
@@ -221,3 +221,5 @@ String formatted = Json.toDisplayString(data, 2);
 //   ]
 // }
 ```
+
+<!-- SENTINEL: This is README.md -->
diff --git a/index.html b/index.html
@@ -161,5 +161,6 @@ <h2>License</h2>
         <p>Licensed under the GNU General Public License version 2 with Classpath exception, 
         same as the OpenJDK project.</p>
     </div>
+    <!-- SENTINEL: This is index.html -->
 </body>
 </html>

-Original file line number
+Diff line change
 //   ]
 // }
 ```
++
 +<!-- SENTINEL: This is README.md -->