BUG:0012144 correct the documentation for GetArrayIndex

Per bug # 0012114, the documentation was wrong.

Change-Id: I4386cc01edc6f84f9ca1aa2a02d19ff61d1d4bdf
Merge topic '0012114-fix-getarrayindex-documentation' into master

736a4ade BUG:0012144 correct the documentation for GetArrayIndex