input: Write a python function to search for a given string in a list of strings.
  assert search_string("example", ["example1", "example2", "example3", "other1", "other2"]) == ['example1', 'example2', 'example3']
  assert search_string("other", ["example1", "example2", "example3", "other1", "other2"]) == ['other1', 'other2']
  assert search_string("none", ["example1", "example2", "example3", "other1", "other2"]) == []
output: def search_string(query, string_list):
      return [s for s in string_list if query in s]