Signed-off-by: baliosian <baliosian@fing.edu.uy>
after changeing TfString to have an empty list when isEpsilon(). 

Signed-off-by: baliosian <baliosian@fing.edu.uy>


Signed-off-by: baliosian <baliosian@fing.edu.uy>


Signed-off-by: baliosian <baliosian@fing.edu.uy>


Signed-off-by: baliosian <baliosian@fing.edu.uy>