Test sintax error

[NataliaMedeiros]

Cases to test in syntax error: | ls | ls |ls ls > ls >> ls < ls << ls | ls > (with extra space in the end) ls >> (with extra space in the end) ls < (with extra space in the end) ls << (with extra space in the end) ls | (with extra space in the end) ls <> ls < > ls >< ls > | ls ls > <