"Line one\n\rLine two\n\r".gsub("\n\r", "\n")
# => "Line one\nLine two\n"
#Transform all runs of whitespace into a single space character
"\n\rThis string\t\t\tuses\n all\tsorts\nof whitespace.".gsub(/\s+/, " ")
# => " This string uses all sorts of whitespace."