

### SUMMARY
In SuSe SLES there is a file: /etc/vimrc. It contains ^M characters, like in line:  101 containing:
    map! <ESC>OM  ^M
When running module blockinfile on this file it removes the ^M characters.
The blockinfile just needs to adds some lines on the end of the file. Even when the lines are already there it removes the ^M characters.

It looks like that it reads the file and cannot handle the ^M characters and writes the buffer without the characters to the file.

##### ISSUE TYPE
- Module blockinfile

##### COMPONENT NAME
blockinfile

##### ANSIBLE VERSION
<!--- Paste verbatim output from "ansible --version" between quotes -->
```
ansible 2.4.2.0
  config file = None
  configured module search path = [u'/root/.ansible/plugins/modules', u'/usr/share/ansible/plugins/modules']
  ansible python module location = /usr/lib/python2.7/site-packages/ansible
  executable location = /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

```

##### OS / ENVIRONMENT
<!--- Provide all relevant information below, e.g. target OS versions, network device firmware, etc. -->


##### STEPS TO REPRODUCE
<!--- Describe exactly how to reproduce the problem, using a minimal test-case -->

<!--- Paste example playbooks or commands between quotes below -->
```yaml

```

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

##### EXPECTED RESULTS
<!--- Describe what you expected to happen when running the steps above -->


##### ACTUAL RESULTS
<!--- Describe what actually happened. If possible run with extra verbosity (-vvvv) -->

<!--- Paste verbatim command output between quotes -->
```paste below

```

diff['after'] = result
    if original == result:
        msg = ''
        changed = False
    elif original is None:
        msg = 'File created'
        changed = True
    elif not blocklines:
        msg = 'Block removed'
        changed = True
    else:
        msg = 'Block inserted'
        changed = True
    if changed and not module.check_mode:
        if module.boolean(params['backup']) and path_exists:
            module.backup_local(path)
        
        real_path = os.path.realpath(params['path'])
        write_changes(module, result, real_path)
    if module.check_mode and not path_exists:
        module.exit_json(changed=changed, msg=msg, diff=diff)
    attr_diff = {}
    msg, changed = check_file_attrs(module, changed, msg, attr_diff)
    attr_diff['before_header'] = '%s (file attributes)' % path
    attr_diff['after_header'] = '%s (file attributes)' % path
    difflist = [diff, attr_diff]
    module.exit_json(changed=changed, msg=msg, diff=difflist)
if __name__ == '__main__':
    main()