Fix test_make_Calculator_user_mods_with_cpi_flags.
Fix test_make_Calculator_user_mods_with_cpi_flags.

Not sure why this error was not found before; perhaps something to do
with two Calculator objects in test with only one being used in test.

mcdeaton13/Tax-Calculator,mmessick/Tax-Calculator,mmessick/Tax-Calculator,mcdeaton13/Tax-Calculator