title: rfc5322: how to fold values without spaces?
body: <p>I've already seen answer on <a href="https://stackoverflow.com/questions/8132599/how-should-quoted-printable-mime-words-be-wrapped-to-the-correct-line-length">similar topic</a>, but rfc5322 says:</p>
  
  <blockquote>
    <p>Unfolding is accomplished by simply removing any CRLF that is immediately followed by WSP.</p>
  </blockquote>
  
  <p>this can break source spaceless text by adding into it spaces.</p>
  
  <p>so how to fold values without spaces? </p>