docs: quotes in comments apparently crash the server

Change-Id: Ie0b47ccde141cb7ffdf243de20411bffbf94fa41
diff --git a/scripts/app_engine_server/redirects.yaml b/scripts/app_engine_server/redirects.yaml
index 6b07aae..571def9 100644
--- a/scripts/app_engine_server/redirects.yaml
+++ b/scripts/app_engine_server/redirects.yaml
@@ -400,7 +400,22 @@
   dst: /guide/components/index.html
   type: permanent
   comment: Redirect to new location
-  
+
+
+
+# ------------------- TRAINING -------------------
+
+- src: /training/cloudsync/aesync.html
+  dst: /guide/google/gcm/index.html
+  type: permanent
+  comment: Syncing with App Engine was removed because it's obsolete.
+
+
+
+
+
+# -------------------- MISC ----------------------
+
 - src: /shareables/
   dst: http://commondatastorage.googleapis.com/androiddevelopers/shareables/
   type: permanent