* First verify the status of each vector. Also double-checks status
* command.
s 0
s 1
s 2
* Make a reference to a vector's element and verify that
* the status hasn't changed.
? 0 5
s 0
* Insert a zero element and ensure that the vector status has not
* been modified
= 0 0 0
s 0
* First verify that vector 1 was untouched by other operations.
s 1
* Insert several non-zero items into a vector and verify
* that the status information has been correctly updated.
= 1 9 10
s 1
= 1 100 101
= 1 -10 -9
s 1
? 1 100