Correct comment

For file-based encryption, /data/adb is always required to encrypt
https://android.googlesource.com/platform/system/extras/+/refs/tags/android-7.0.0_r36/ext4_utils/ext4_crypt_init_extensions.cpp
68258e8444%5E%21/

native/jni/core/bootstages.cpp

@@ -289,7 +289,7 @@ void post_fs_data(int client) {
         } else {
             // If the folder is not automatically created by Android,
             // do NOT proceed further. Manual creation of the folder
-            // will cause bootloops on FBE devices.
+            // will have no encryption flag, which will cause bootloops on FBE devices.
             LOGE(SECURE_DIR " is not present, abort\n");
             goto early_abort;
         }

scripts/util_functions.sh

@@ -528,9 +528,8 @@ check_data() {
   if grep ' /data ' /proc/mounts | grep -vq 'tmpfs'; then
     # Test if data is writable
     touch /data/.rw && rm /data/.rw && DATA=true
-    # Test if DE storage is writable
+    # Test if data is decrypted
     $DATA && [ -d /data/adb ] && touch /data/adb/.rw && rm /data/adb/.rw && DATA_DE=true
-    # Some recovery have broken FDE implementations, which cannot access existing folders
     $DATA_DE && [ -d /data/adb/magisk ] || mkdir /data/adb/magisk || DATA_DE=false
   fi
   NVBASE=/data