eIndex < 0)     testtext .t byteindex 0 0 } {0.0 0} test textIndex-0.0 {TkTextMakeByteIndex} {testtext} {     # (indexPtr->linePtr == NULL)     testtext .t byteindex 0 0 } {0.0 0} test textIndex-0.0 {TkTextMakeByteIndex} {testtext} {     # not (indexPtr->linePtr == NULL)     testtext .t byteindex 0 0 } {0.0 0} test textIndex-0.0 {TkTextMakeByteIndex: shortcut for 0} {testtext} {     # 