 easy to parse for further processing.</p></td>
    </tr>
    <tr>
      <th>sep_in</th>
      <td><p>(short for separator input) if character, is interpreted as a
regular expression (wrapped internally into <code><a href='https://stringr.tidyverse.org/reference/modifiers.html'>stringr::regex()</a></code>). 
The default value is a regular expression that matches any sequence of
non-alphanumeric values. All matches will be replaced by underscores 
(additionally to <code>"_"</code> and <code>" "</code>, for w