Wasn't sure if the call-seq section needed to be updated. Doc was referencing first through fourth forms, but then buried the "final" form kinda deep in some code. Added all four forms, then added return values for all but the most obvious calls.
This issue was solved with changeset r33388.
Jonathan, thank you for reporting this issue.
Your contribution to Ruby is greatly appreciated.
May Ruby be with you.
array.c (rb_ary_initialize): Add output for examples. Patch by
Jonathan Mukai. [Ruby 1.9 - Bug #5216]