     # Multiple segments, make sure add segment size to index.      .t mark set foo 0.0      set x [testtext .t byteindex 0 0]     .t mark unset foo     set x } {0.0 0} test textIndex-0.00 {TkTextMakeByteIndex: verify index is in range} {testtext} {     # (segPtr == NULL)     testtext .t byteindex 0 0 } {0.0 0} test textIndex-0.00 {TkTextMakeByteIndex: verify index is in range} {testtext} {     # 