ring for <code>fixed = TRUE</code>) to be matched in the given
character vector.  Default, <code>@rm_non_words</code> uses the
<code>rm_non_words</code> regex from the regular expression dictionary from
the <code>dictionary</code> argument.</dd>
      <dt>replacement</dt>
      <dd>Replacement for matched <code>pattern</code> (<b><em>Note:</em></b> default is
" ", whereas most <span class = "pkg">qdapRegex</span> functions replace with "").</dd>
      <dt>extract</dt>
      <dd>logical.  If <code>TRUE</code