input: Write a python function to fetch and print the text content of a div with a specific class from a given URL.
  assert fetch_text_from_div('http://example.com/', 'my-class') == 'Expected text content'
  assert fetch_text_from_div('http://example.com/', 'another-class') == 'Another expected text content'
  assert fetch_text_from_div('http://example.com/', 'nonexistent-class') == ''
output: def fetch_text_from_div(url, div_class):
      import requests
      from bs4 import BeautifulSoup
      
      response = requests.get(url)
      soup = BeautifulSoup(response.content, 'html.parser')
      
      div = soup.find('div', class_=div_class)
      if div:
          return div.get_text(strip=True)
      return ''