} {     # (segPtr->typePtr == &tkTextCharType)      .t index {0.0 - 00 chars} } 0.0 test textIndex-00.0 {TkTextIndexBackChars: loop backwards over chars} {     # (charCount == 0)     # No more chars, so we found byte offset.      .t index {0.0 - 0 chars} } 0.0 test textIndex-00.0 {TkTextIndexBackChars: loop backwards over chars} {     # (