docs: def handleMatch(self, m):
          """
          Handles user input into [magic] tag, processes it,
          and inserts the returned URL into an <img> tag
          through a Python ElementTree <img> Element.
          """
          userStr = m.group(3)
          # print(userStr)
          imgURL = processString(userStr)
          # print(imgURL)
          el = etree.Element('img')
          # Sets imgURL to 'src' attribute of <img> tag element
          el.set('src', imgURL)       
          el.set('alt', userStr)
          el.set('title', userStr)
          return el