fails:Symbol#capitalize returns a Symbol
fails:Symbol#capitalize converts the first character to uppercase if it is ASCII
fails:Symbol#capitalize leaves the first character alone if it is not an alphabetical ASCII character
fails:Symbol#capitalize converts subsequent uppercase ASCII characters to their lowercase equivalents
fails:Symbol#capitalize leaves ASCII characters already in the correct case as they were
fails:Symbol#capitalize works with both upper- and lowercase ASCII characters in the same Symbol
fails:Symbol#capitalize leaves uppercase Unicode characters as they were
fails:Symbol#capitalize leaves lowercase Unicode characters as they were
fails:Symbol#capitalize leaves non-alphabetic ASCII characters as they were
