fails:String#% raises an ArgumentError for unused arguments when $DEBUG is true
fails:String#% raises an ArgumentError for huge precisions for %s
fails:String#% behaves as if calling Kernel#Float for %e arguments, when the passed argument does not respond to #to_ary
fails:String#% behaves as if calling Kernel#Float for %e arguments, when the passed argument is hexadecimal string
fails:String#% behaves as if calling Kernel#Float for %E arguments, when the passed argument does not respond to #to_ary
fails:String#% behaves as if calling Kernel#Float for %E arguments, when the passed argument is hexadecimal string
fails:String#% behaves as if calling Kernel#Float for %f arguments, when the passed argument does not respond to #to_ary
fails:String#% behaves as if calling Kernel#Float for %f arguments, when the passed argument is hexadecimal string
fails:String#% behaves as if calling Kernel#Float for %g arguments, when the passed argument does not respond to #to_ary
fails:String#% behaves as if calling Kernel#Float for %g arguments, when the passed argument is hexadecimal string
fails:String#% behaves as if calling Kernel#Float for %G arguments, when the passed argument does not respond to #to_ary
fails:String#% behaves as if calling Kernel#Float for %G arguments, when the passed argument is hexadecimal string
fails:String#% when format string contains %<> formats should raise ArgumentError if no hash given
fails:String#% pads with spaces for %E with Inf, -Inf, and NaN
