Make sure all files have trailing newline (#5076) (#5081)

* Make sure all files have trailing newline.

* Adjust tests.

(cherry picked from commit fa6c009ff0)

tests/integration/targets/xml/tasks/test-remove-attribute.yml

@@ -16,6 +16,9 @@
       state: absent
     register: remove_attribute
 
+  - name: Add trailing newline
+    shell: echo "" >> /tmp/ansible-xml-beers.xml
+
   - name: Compare to expected result
     copy:
       src: results/test-remove-attribute.xml