<!--- Verify first that your improvement is not already reported on GitHub -->
<!--- Also test if the latest release and devel branch are affected too -->
<!--- Complete *all* sections as described, this form is processed automatically -->

##### SUMMARY
<!--- Explain the problem briefly below, add suggestions to wording or structure -->

latest and devel documentation shows example to add escape characters for double quotes text. 
i.e. to bypass " with \\". But this needs not to be done anymore with respect to the latest ansible version (ex. 2.8.5v)

Current example : 
- name: Add several more beers to the 'beers' element and add them before the 'Rochefort 10' element
  xml:
    path: /foo/bar.xml
    xpath: '/business/beers/beer[text()=\\"Rochefort 10\\"]'
    insertbefore: yes
    add_children:
    - beer: Old Rasputin
    - beer: Old Motor Oil
    - beer: Old Curmudgeon

Should be : 
- name: Add several more beers to the 'beers' element and add them before the 'Rochefort 10' element
  xml:
    path: /foo/bar.xml
    xpath: '/business/beers/beer[text()="Rochefort 10"]'
    insertbefore: yes
    add_children:
    - beer: Old Rasputin
    - beer: Old Motor Oil
    - beer: Old Curmudgeon


<!--- HINT: Did you know the documentation has an "Edit on GitHub" link on every page ? -->

##### ISSUE TYPE
- Documentation Report

##### COMPONENT NAME
<!--- Write the short name of the rst file, module, plugin, task or feature below, use your best guess if unsure -->
xml module (label:m:xml)
https://docs.ansible.com/ansible/latest/modules/xml_module.html
https://docs.ansible.com/ansible/devel/modules/xml_module.html

##### ANSIBLE VERSION
<!--- Paste verbatim output from "ansible --version" between quotes -->
```paste below
[vagrant@azure-controller playbooks]$ ansible --version
ansible 2.8.5
  config file = /home/vagrant/.ansible.cfg
  configured module search path = [u'/home/vagrant/.ansible/plugins/modules', u'/usr/share/ansible/plugins/modules']
  ansible python module location = /usr/lib/python2.7/site-packages/ansible
  executable location = /usr/bin/ansible
  python version = 2.7.5 (default, Aug  7 2019, 00:51:29) [GCC 4.8.5 20150623 (Red Hat 4.8.5-39)]

```

##### CONFIGURATION
<!--- Paste verbatim output from "ansible-config dump --only-changed" between quotes -->
```paste below
Not applicable
```

##### OS / ENVIRONMENT
<!--- Provide all relevant information below, e.g. OS version, browser, etc. -->
Not applicable
##### ADDITIONAL INFORMATION
<!--- Describe how this improves the documentation, e.g. before/after situation or screenshots -->
before: 
- name: Add several more beers to the 'beers' element and add them before the 'Rochefort 10' element
  xml:
    path: /foo/bar.xml
    xpath: '/business/beers/beer[text()=\\"Rochefort 10\\"]'
    insertbefore: yes
    add_children:
    - beer: Old Rasputin
    - beer: Old Motor Oil
    - beer: Old Curmudgeon

after:
- name: Add several more beers to the 'beers' element and add them before the 'Rochefort 10' element
  xml:
    path: /foo/bar.xml
    xpath: '/business/beers/beer[text()="Rochefort 10"]'
    insertbefore: yes
    add_children:
    - beer: Old Rasputin
    - beer: Old Motor Oil
    - beer: Old Curmudgeon

<!--- HINT: You can paste gist.github.com links for larger files -->

module.deprecate("Parameter 'attribute=%s' is ignored when using 'content=attribute' only 'xpath' is used. Please remove entry." % attribute, '2.12')
    
    if xml_string:
        infile = BytesIO(to_bytes(xml_string, errors='surrogate_or_strict'))
    elif os.path.isfile(xml_file):
        infile = open(xml_file, 'rb')
    else:
        module.fail_json(msg="The target XML source '%s' does not exist." % xml_file)
    
    if xpath is not None:
        try:
            etree.XPath(xpath)
        except etree.XPathSyntaxError as e:
            module.fail_json(msg="Syntax error in xpath expression: %s (%s)" % (xpath, e))
        except etree.XPathEvalError as e:
            module.fail_json(msg="Evaluation error in xpath expression: %s (%s)" % (xpath, e))
    
    try:
        parser = etree.XMLParser(remove_blank_text=pretty_print, strip_cdata=strip_cdata_tags)
        doc = etree.parse(infile, parser)
    except etree.XMLSyntaxError as e:
        module.fail_json(msg="Error while parsing document: %s (%s)" % (xml_file or 'xml_string', e))
    
    global orig_doc
    orig_doc = copy.deepcopy(doc)
    if print_match:
        do_print_match(module, doc, xpath, namespaces)
    if count:
        count_nodes(module, doc, xpath, namespaces)
    if content == 'attribute':