move var and add quotes

bigboot_setup_environment.yml

@@ -7,7 +7,6 @@
 
   vars:
     bigboot_size_target: 1G
-    initramfs_backup_extension: old
     ansible_ssh_retries: 10
 
   tasks:

tasks/cleanup.yml

@@ -1,7 +1,8 @@
 ---
-- name: Get kernel version
+- name: Set kernel version and backup extension
   ansible.builtin.set_fact:
     initramfs_kernel_version: "{{ ansible_facts['kernel'] }}"
+    initramfs_backup_extension: old
 
 - name: Remove dracut extend boot module
   ansible.builtin.file:
@@ -19,13 +20,13 @@
     - name: Restore previous initramfs
       ansible.builtin.copy:
         remote_src: true
-        src: /boot/initramfs-{{ initramfs_kernel_version }}.img.{{ initramfs_backup_extension }}
-        dest: /boot/initramfs-{{ initramfs_kernel_version }}.img
+        src: "/boot/initramfs-{{ initramfs_kernel_version }}.img.{{ initramfs_backup_extension }}"
+        dest: "/boot/initramfs-{{ initramfs_kernel_version }}.img"
         mode: "0600"
 
     - name: Remove initramfs backup file
       ansible.builtin.file:
-        path: /boot/initramfs-{{ initramfs_kernel_version }}.img.{{ initramfs_backup_extension }}
+        path: "/boot/initramfs-{{ initramfs_kernel_version }}.img.{{ initramfs_backup_extension }}"
         state: absent
 
 ...