input: Write a python function to fetch and parse HTML content to extract text from specific div elements with class 'comments'.
  assert fetch_comments('http://example.com') == ['First comment', 'Second comment', 'Third comment']
  assert fetch_comments('http://example.org') == ['Example comment 1', 'Example comment 2']
  assert fetch_comments('http://example.net') == []
output: def fetch_comments(url):
      import requests
      from bs4 import BeautifulSoup
  
      response = requests.get(url)
      soup = BeautifulSoup(response.content, 'html.parser')
      
      comments = []
      for div in soup.find_all('div', class_='comments'):
          comments.append(div.get_text(strip=True))
      
      return comments