----------------
##3       #:3   <== 2
                ==> 1.99
@ Absolute error = 1.0000000000e-2, Relative error = 5.0251256281e-3
##3       #:5   <== 4
                ==> 3.9999
@ Absolute error = 1.0000000000e-4, Relative error = 2.5000625016e-5
----------------
##9       #:2   <== -1
                ==> -1.1
@ Absolute error = 1.0000000000e-1, Relative error = 1.0000000000e-1
##9       #:4   <== -3
                ==> -3.001
@ Absolute error = 1.0000000000e-3, Relative error = 3.3333333333e-4
----------------
##11      #:2   <== -1.5e9
                ==> -1.50001e9
@ Absolute error = 1.0000000000e+4, Relative error = 6.6666666667e-6
----------------
##17      #:3   <== -6-5i
                ==> -6.1-5.02i
@ Absolute error = 1.0198039027e-1, Relative error = 1.3057250985e-2

+++  File "old" differs from file "new"
