1*13de33a5SJulio Merino 2*13de33a5SJulio Merinoset -- a b c d e f g h i j 3*13de33a5SJulio Merino[ "$1" = a ] || echo "error at line $LINENO" 4*13de33a5SJulio Merino[ "${1}" = a ] || echo "error at line $LINENO" 5*13de33a5SJulio Merino[ "${1-foo}" = a ] || echo "error at line $LINENO" 6*13de33a5SJulio Merino[ "${1+foo}" = foo ] || echo "error at line $LINENO" 7*13de33a5SJulio Merino[ "$1+foo" = a+foo ] || echo "error at line $LINENO" 8*13de33a5SJulio Merino[ "$10" = a0 ] || echo "error at line $LINENO" 9*13de33a5SJulio Merino[ "$100" = a00 ] || echo "error at line $LINENO" 10*13de33a5SJulio Merino[ "${10}" = j ] || echo "error at line $LINENO" 11*13de33a5SJulio Merino[ "${10-foo}" = j ] || echo "error at line $LINENO" 12*13de33a5SJulio Merino[ "${100-foo}" = foo ] || echo "error at line $LINENO" 13