docs: def find_content(self, text, index=0, backtick=False):
          """Find content."""
  
          curly_count = 0
          last = '\n'
          self.lines_num = 1
          length = len(text)
          while index < length:
              start_index = index
              c = text[index]
              if c == '{' and backtick:
                  curly_count += 1
              elif c == '}' and backtick:
                  if curly_count:
                      curly_count -= 1
                  else:
                      index += 1
                      return index
              elif c == '`':
                  done = False
                  first = True
                  backtick_content = []
                  start_index = index
                  while not done:
                      m = (RE_TEMPLATE_START if first else RE_TEMPLATE_MIDDLE_END).match(text, index)
                      first = False
                      if m:
                          self.line_num += m.group(0).count('\n')
                          content = self.evaluate_strings(m.group(1), True)
                          if content:
                              backtick_content.append(content)
                          index = m.end(0)
                          if m.group(2) == '${':
                              index = self.find_content(text, index, True)
                          else:
                              done = True
                      else:
                          done = True
                  if backtick_content:
                      self.quoted_strings.append([' '.join(backtick_content), self.line_num, 'utf-8'])
              elif c in ('\'', '"'):
                  m = RE_STRING.match(text, index)
                  if m:
                      self.evaluate_strings(m.group(0)[1:-1])
                      self.line_num += m.group(0).count('\n')
                      index = m.end(0)
              elif c == '\n':
                  self.line_num += 1
              elif last == '\n' or c == '/':
                  m = RE_COMMENT.match(text, index)
                  if m:
                      g = m.groupdict()
                      if g['start'] is None:
                          self.evaluate_inline_tail(g)
                      else:
                          self.evaluate_inline(g)
                      index = m.end(0)
                  elif c == '/':
                      m = RE_BLOCK_COMMENT.match(text, index)
                      if m:
                          self.evaluate_block(m.group(0))
                          self.line_num += m.group(0).count('\n')
                          index = m.end(0)
  
              if index == start_index:
                  index += 1
              last = text[index - 1]