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##### SUMMARY
I want to be able to use a pure (non-regex) line with lineinfile. Without accidentally escaping or not escaping characters.

##### ISSUE TYPE
- Feature Idea

##### COMPONENT NAME
lineinfile

##### ADDITIONAL INFORMATION

I have a line in a file which has lots of special characters. I want to use Ansible's lineinfile module.

Ansible's lineinfile module requires a regular expression, which means lots of escaping for me, and a role or playbook that is more difficult to read.

Could the module support a non-regex line too?

Example of problem regex (have fun escaping this one! - real world example):

```yaml
    lineinfile:
      path: /etc/apt/apt.conf.d/50unattended-upgrades
      regexp: '#         "${distro_id}:${distro_codename}-updates";'
      line: '         "${distro_id}:${distro_codename}-updates";'
```
if module._diff:
        diff['before'] = to_native(b''.join(b_lines))
    if regexp is not None:
        bre_m = re.compile(to_bytes(regexp, errors='surrogate_or_strict'))
    if insertafter not in (None, 'BOF', 'EOF'):
        bre_ins = re.compile(to_bytes(insertafter, errors='surrogate_or_strict'))
    elif insertbefore not in (None, 'BOF'):
        bre_ins = re.compile(to_bytes(insertbefore, errors='surrogate_or_strict'))
    else:
        bre_ins = None
    
    
    index = [-1, -1]
    match = None
    exact_line_match = False
    b_line = to_bytes(line, errors='surrogate_or_strict')
    
    
    
    
    
    
    
    
    if regexp is not None:
        for lineno, b_cur_line in enumerate(b_lines):
            match_found = bre_m.search(b_cur_line)
            if match_found:
                index[0] = lineno
                match = match_found