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/parsing/roles/test_bad_parsing/tasks/main.yml

@@ -19,9 +19,9 @@
 # the following tests all raise errors, to use them in a Makefile, we run them with different flags, as
 # otherwise ansible stops at the first one and we want to ensure STOP conditions for each
 
-- set_fact: 
+- set_fact:
     test_file: "{{ output_dir }}/ansible_test_file"  # FIXME, use set tempdir
-    test_input: "owner=test" 
+    test_input: "owner=test"
     bad_var: "{{ output_dir }}' owner=test"
     chdir: "mom chdir=/tmp"
   tags: common

test/integration/targets/parsing/roles/test_bad_parsing/tasks/scenario1.yml

@@ -2,4 +2,3 @@
   file: path={{ test_file }} {{ test_input }}
   failed_when: False # ignore the module, just test the parser
   tags: scenario1
-

test/integration/targets/parsing/roles/test_bad_parsing/tasks/scenario2.yml

@@ -2,4 +2,3 @@
   file: path={{ test_file }} owner=test2 {{ test_input }}
   failed_when: False # ignore the module, just test the parser
   tags: scenario2
-

test/integration/targets/parsing/roles/test_bad_parsing/tasks/scenario3.yml

@@ -2,4 +2,3 @@
   shell: echo hi {{ chdir }}
   failed_when: False
   tags: scenario3
-

test/integration/targets/parsing/roles/test_bad_parsing/tasks/scenario4.yml

@@ -2,4 +2,3 @@
   file: "name={{ bad_var }}"
   failed_when: False
   tags: scenario4
-