Write a program to pull web content from a remote source using token-based authentication.
Implement fetch_web_content(url, token), sending the token as an HTTP Bearer token and returning the response body as a string. Raise RuntimeError for network or HTTP failures. The function accepts two strings and returns one string. Deterministic data: URLs may be used as remote-source fixtures during testing.
url and token are stringsRuntimeErrordef fetch_web_content(url, token):