checkbits.sh: don't exec the diff, because that means that the workfiles remain after the program finishes.
checkbits.sh: don't exec the diff, because that means that the workfiles remain after the program finishes.

davidfstr/discount,binki/discount,davidfstr/discount,binki/discount,gm2bv/discount,gm2bv/discount,binki/discount,binki/discount,gm2bv/discount,OliverLetterer/discount,davidfstr/discount,davidfstr/discount,binki/discount,OliverLetterer/discount,gm2bv/discount,OliverLetterer/discount