feat: better string representation of errors
feat: better string representation of errors

karma-runner/karma,johnjbarton/karma,maksimr/karma,david-garcia-nete/karma,johnjbarton/karma,karma-runner/karma,johnjbarton/karma,david-garcia-nete/karma,maksimr/karma,david-garcia-nete/karma,johnjbarton/karma,karma-runner/karma,maksimr/karma,karma-runner/karma