Test #1: "+2" compares as a string
Test #2: "+2a" compares as a string
Test #3: "+2 " compares as a string
Test #4: " 2" compares as a string
after addition
Test #5: "+2" compares as a string
Test #6: "+2a" compares as a string
Test #7: "+2 " compares as a string
Test #8: " 2" compares as a string
Test #9: "3e5" <= "5"
Test #10: test
Test #11: test
Test #12: 1.500000 1.500000e+00
Test #13: nomatch
Test #14: 1:2,3
Test #15: 4