input: Write a function to scrape a given website and return the scraped content. The function should take the URL of the website as input and use the requests and BeautifulSoup libraries to fetch and parse the page content. If the URL is invalid or the page cannot be fetched, the function should return an appropriate error message.
  
  assert scrape_website('http://example.com')==<expected scraped content>
  assert scrape_website('http://invalid-url.com')=='Error in fetching the page'
output: def scrape_website(url):
      import requests
      from bs4 import BeautifulSoup
      try:
          response = requests.get(url)
          response.raise_for_status()
          soup = BeautifulSoup(response.text, 'html.parser')
          return soup.get_text()
      except requests.exceptions.RequestException:
          return 'Error in fetching the page'