Rebasing onto origin/fix/bulk_edit (PR #14083, which independently
bounds the edit_pdf doc index via manual checks) applied cleanly with
no reported conflicts, but left two copies of the same "doc index is
out of bounds" check back to back in both EditPdfDocumentsSerializer
.validate and BulkEditSerializer._validate_parameters_edit_pdf --
#14083's own `< 0 or >= len(operations)` check is now fully redundant
here since PdfEditOperationSerializer.doc already has min_value=0.
Removed the redundant second check in both methods.
Also split the merged test_edit_pdf_invalid_params subtest: #14083's
loop asserted the same "doc index is out of bounds" message for both
doc=-1 and doc=2**32, but with min_value=0 in place, -1 is now
rejected earlier by the field itself with a different message.
Trenton Holmes
34f2385df4