Fix cosmetic problems in YAML source

This change corrects problems reported by the `yamllint` linter.

Since key duplication problems were removed in 4d48711, this commit
mainly fixes trailing spaces and extra empty lines at beginning/end of
files.

test/integration/targets/stat/meta/main.yml

@@ -1,3 +1,2 @@
-dependencies: 
+dependencies:
   - prepare_tests
-

test/integration/targets/stat/tasks/main.yml

@@ -167,4 +167,3 @@
     that:
       - "stat_result.stat.md5 == '5eb63bbbe01eeed093cb22bb8f5acdc3'"
   when: ansible_fips|bool != True
-