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/handlers/roles/test_force_handlers/handlers/main.yml

@@ -1,2 +1,2 @@
 - name: echoing handler
-  command: echo CALLED_HANDLER_{{ inventory_hostname }}
+  command: echo CALLED_HANDLER_{{ inventory_hostname }}

test/integration/targets/handlers/roles/test_force_handlers/tasks/main.yml

@@ -21,6 +21,6 @@
 - name: EXPECTED FAILURE fail task for C
   fail: msg="Fail C"
   when: inventory_hostname == 'C'
-  
+
 - name: echo after A and C have failed
-  command: echo CALLED_TASK_{{ inventory_hostname }}
+  command: echo CALLED_TASK_{{ inventory_hostname }}

test/integration/targets/handlers/roles/test_handlers/handlers/main.yml

@@ -1,5 +1,5 @@
 - name: set handler fact
-  set_fact: 
+  set_fact:
     handler_called: True
 - name: test handler
   debug: msg="handler called"

test/integration/targets/handlers/roles/test_handlers/meta/main.yml

@@ -1,2 +1 @@
 dependencies: []
-

test/integration/targets/handlers/roles/test_handlers/tasks/main.yml

@@ -24,7 +24,7 @@
 
 - name: notify the handler for host A only
   shell: echo
-  notify: 
+  notify:
     - set handler fact
   when: inventory_hostname == 'A'
   tags: scenario1

test/integration/targets/handlers/roles/test_handlers_meta/handlers/main.yml

@@ -1,5 +1,5 @@
 - name: set_handler_fact_1
-  set_fact: 
+  set_fact:
     handler1_called: True
 
 - name: set_handler_fact_2

test/integration/targets/handlers/roles/test_handlers_meta/tasks/main.yml

@@ -18,13 +18,13 @@
 
 - name: notify the first handler
   shell: echo
-  notify: 
+  notify:
     - set_handler_fact_1
 
 - name: force handler execution now
   meta: "flush_handlers"
 
-- name: assert handler1 ran and not handler2 
+- name: assert handler1 ran and not handler2
   assert:
     that:
         - "handler1_called is defined"
@@ -36,6 +36,5 @@
 
 - name: notify the second handler
   shell: echo
-  notify: 
+  notify:
     - set_handler_fact_2
-

test/integration/targets/handlers/test_handlers.yml

@@ -12,7 +12,7 @@
   connection: local
   tasks:
     - name: verify handler2 ran
-      assert: 
+      assert:
         that:
             - "not hostvars[inventory_hostname]['handler1_called']"
             - "'handler2_called' in hostvars[inventory_hostname]"