input: def crawl(url: str) -> None:
      """
      A web crawler in Python that starts from the given URL, visits all linked pages,
      and scrapes the content from the page. The crawler stops when there are no more
      new links to visit.
      
      >>> crawl("http://example.com")
      # Assume http://example.com has two links: "http://example1.com" and "http://example2.com"
      # The function would visit both links and scrape their content.
      """
output:     import requests
      from bs4 import BeautifulSoup
      from urllib.parse import urljoin
  
      visited_urls = set()
      urls_to_visit = [url]
  
      while urls_to_visit:
          current_url = urls_to_visit.pop(0)
          if current_url in visited_urls:
              continue
  
          try:
              response = requests.get(current_url)
              response.raise_for_status()
          except requests.RequestException:
              continue
  
          visited_urls.add(current_url)
          print(f"Visiting: {current_url}")
  
          soup = BeautifulSoup(response.text, 'html.parser')
          print(f"Scraped content from {current_url}: {soup.get_text()}")
  
          for link in soup.find_all('a', href=True):
              absolute_url = urljoin(current_url, link['href'])
              if absolute_url not in visited_urls:
                  urls_to_visit.append(absolute_url)