Make sure all files have trailing newline (#5076)

* Make sure all files have trailing newline.

* Adjust tests.

tests/integration/targets/xml/tasks/test-set-attribute-value.yml

@@ -17,6 +17,9 @@
       value: 'false'
     register: set_attribute_value
 
+  - name: Add trailing newline
+    shell: echo "" >> /tmp/ansible-xml-beers.xml
+
   - name: Compare to expected result
     copy:
       src: results/test-set-attribute-value.xml