The first checks for apostrophes (') and single primes (′), the second checks for quotation marks (") and double primes (″). A typographer would correctly use the prime characters, and, indeed, this is what Wikipedia does, so a cut and paste for any country latlon on Wikipedia will fail without them. ```test_primes_and_double_primes``` beginning on line 211 looks for these. Believe it's in the commit message.