class Google::Auth::ServiceAccountCredentials

enclosing quotes.
Specifically, interprets the "\n" sequence for newline, and removes
Handles certain escape sequences that sometimes appear in input.

def self.unescape str
  str = str.gsub '\n', "\n"
  str = str[1..-2] if str.start_with?('"') && str.end_with?('"')
  str
end