Description: Fix encrypted installs in Calamares
 Adding new items to /etc/default/grub wasn't working (new items that were to
 be added to the file were being silently dropped). This resulted in the
 GRUB_ENABLE_CRYPTODISK setting not being present in /etc/default/grub within
 the installed system, resulting in the bootloader refusing to install in an
 encrypted installation. This patch adds the needed functionality to the
 grubcfg module to fix the issue.
Author: Aaron Rainbolt <arraybolt3@gmail.com>
Origin: ubuntu
Bug: https://github.com/calamares/calamares/issues/2233
Bug-Ubuntu: https://bugs.launchpad.net/ubuntu/+source/calamares/+bug/2043301
Forwarded: https://github.com/calamares/calamares/pull/2234
Last-Update: 2023-11-14
---
This patch header follows DEP-3: http://dep.debian.net/deps/dep3/
diff --git a/src/modules/grubcfg/main.py b/src/modules/grubcfg/main.py
index 82b1837f8..d2ed8bf19 100644
--- a/src/modules/grubcfg/main.py
+++ b/src/modules/grubcfg/main.py
@@ -104,11 +104,17 @@ def update_existing_config(default_grub, grub_config_items):
             # check if this is one of the keys we care about
             if key in grub_config_items.keys():
                 print(f"{key}={grub_config_items[key]}")
+                del grub_config_items[key]
             else:
                 print(line)
         else:
             print(line)
 
+    if len(grub_config_items) != 0:
+        with open(default_grub, "a") as grub_file:
+            for dict_key, dict_val in grub_config_items.items():
+                grub_file.write(f"{dict_key}={dict_val}")
+
 
 def modify_grub_default(partitions, root_mount_point, distributor):
     """