input: Write a function that scrapes hotel reviews from TripAdvisor's website. The function should take a URL as input and output the titles and text of all the reviews on that page. Use the `requests` library to make HTTP requests and the `BeautifulSoup` library to parse the HTML content.
  assert scrape_hotel_reviews('<url>') == None
  assert scrape_hotel_reviews('<invalid_url>') == None
output: def scrape_hotel_reviews(url):
      try:
          import requests
          from bs4 import BeautifulSoup
          response = requests.get(url)
          if response.status_code != 200:
              return None
          soup = BeautifulSoup(response.content, 'html.parser')
          reviews = []
          for review in soup.find_all('div', class_='review-container'):
              title = review.find('span', class_='noQuotes').text
              text = review.find('p', class_='partial_entry').text
              reviews.append((title, text))
          return reviews
      except:
          return None