Ansible: Task executor use .format() which have problem with \u2018 characters

ISSUE TYPE

• Bug Report

COMPONENT NAME

ansible/plugins/action/__init__.py

ANSIBLE VERSION

ansible 2.2.0.0
  config file = /etc/ansible/ansible.cfg
  configured module search path = Default w/o overrides

CONFIGURATION

none

OS / ENVIRONMENT

x86_64 GNU/Linux

SUMMARY

An error coming back from a linux box contains the \u2018 character which seems to have an implementation issue in python 2.x.

see - '{0}'.format(u'Test it\u2018s unicode implementation')
Traceback (most recent call last):
File "", line 1, in
UnicodeEncodeError: 'ascii' codec can't encode character u'\u2018' in position 7: ordinal not in range(128)

but run fine in python 3.x

STEPS TO REPRODUCE

Message coming back from the linux box, \u2018 is used several times :
fatal: [crlg.be-cloud.be]: FAILED! => {
"failed": true,
"msg": "Failed to set permissions on the temporary files Ansible needs to create when becoming an unprivileged user (rc: 1, err: chown: changing ownership of ‘/tmp/ansible-tmp-1483137683.83-3208985635661/’: Operation not permitted\nchown: changing ownership of ‘/tmp/ansible-tmp-1483137683.83-3208985635661/git.py’: Operation not permitted\n). For information on working around this, see https://docs.ansible.com/ansible/become.html#becoming-an-unprivileged-user"
}

EXPECTED RESULTS

The message should be displayed

ACTUAL RESULTS

An exception occurred during task execution. The full traceback is:
Traceback (most recent call last):
  File "/usr/lib/python2.7/dist-packages/ansible/executor/task_executor.py", line 119, in run
    res = self._execute()
  File "/usr/lib/python2.7/dist-packages/ansible/executor/task_executor.py", line 490, in _execute
    result = self._handler.run(task_vars=variables)
  File "/usr/lib/python2.7/dist-packages/ansible/plugins/action/normal.py", line 33, in run
    results = merge_hash(results, self._execute_module(tmp=tmp, task_vars=task_vars))
  File "/usr/lib/python2.7/dist-packages/ansible/plugins/action/__init__.py", line 618, in _execute_module
    self._fixup_perms2(remote_files, remote_user)
  File "/usr/lib/python2.7/dist-packages/ansible/plugins/action/__init__.py", line 395, in _fixup_perms2
    ' see https://docs.ansible.com/ansible/become.html#becoming-an-unprivileged-user'.format(res['rc'], res['stderr']))
UnicodeEncodeError: 'ascii' codec can't encode character u'\u2018' in position 29: ordinal not in range(128)

fatal: [crlg.be-cloud.be]: FAILED! => {
    "failed": true, 
    "msg": "Unexpected failure during module execution.", 
    "stdout": ""
}

I fixed the problem using the "xxxx %s xxxx" % (res['rc'], res['stderr']) instead.