title: RegEx find substrings in group
body: <p>I try to find (select) all characters / in Group2 (red)...</p>
  <p>(http://.<em>?)(/.</em>/)(.*?.svg?)
  <a href="https://i.stack.imgur.com/fI4pF.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/fI4pF.png" alt="enter image description here" /></a></p>
  <p><a href="https://regex101.com/r/woniEN/5" rel="nofollow noreferrer">https://regex101.com/r/woniEN/5</a></p>
  <p>How to do this?</p>
  <p>Regards,
  Igor</p>