Revert "update tests"

This reverts commit f52f88a7a6645393ec249d349b9843a0ec021db5.
Revert "option is called disable_color not no_color"

This reverts commit b25ceeb44d12dc4391d8ff41c9b5230607b7d346.
Revert "Merge pull request #119 from att14/assertion_output"

This reverts commit 573cbbe036459985365dcd2b74be9374791fa7c0, reversing
changes made to 3c56ef7547aad798bdbd2c80b0f195f638ad649c.