Quote pathnames of roles' tasks and handlers files so that _load_tasks() can tokenize them properly

With the help of AlejandroTrev's eagle eyes. Thanks !

lib/ansible/playbook/play.py

@@ -21,6 +21,7 @@ from ansible.utils.template import template
 from ansible import utils
 from ansible import errors
 from ansible.playbook.task import Task
+import pipes
 import shlex
 import os
 
@@ -185,13 +186,13 @@ class Play(object):
             if not os.path.isfile(task) and not os.path.isfile(handler) and not os.path.isfile(vars_file) and not os.path.isdir(library):
                 raise errors.AnsibleError("found role at %s, but cannot find %s or %s or %s or %s" % (path, task, handler, vars_file, library))
             if os.path.isfile(task):
-                nt = dict(include=task, vars=has_dict)
+                nt = dict(include=pipes.quote(task), vars=has_dict)
                 for k in special_keys:
                     if k in special_vars:
                         nt[k] = special_vars[k]
                 new_tasks.append(nt)
             if os.path.isfile(handler):
-                nt = dict(include=handler, vars=has_dict)
+                nt = dict(include=pipes.quote(handler), vars=has_dict)
                 for k in special_keys:
                     if k in special_vars:
                         nt[k] = special_vars[k]