unset leaves array in inconsistent state

[Craig Lawson]

According to the bash documentation, "unset NAME[SUBSCRIPT]" destroys an 
array element. However, the documentation is not clear on whether 
elements NAME[SUBSCRIPT] are shifted down. What actually happens is that 
the array length is decremented and the elements are NOT shifted. With 
the current behavior, it is cumbersome to deal with arrays with unset 
elements.

For an exhausting discussion, please see Red Hat bug report #62427 (at 
"http://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=62427";).

Sincerely,
Craig.
craig.lawson@sbcglobal.net