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-set-attribute-value-unicode.yml

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