(j3.2006) Order of application of elemental procedures

[Van Snyder]

To provide for impure elemental procedures, the specification "in any
order" at [04-007:288:11] and [04-007:289:8] was changed to "in array
element order".

Do we want to draw a distinction between pure and impure elementals,
using "in any order" for pure ones and "in array element order" for
impure ones?  I don't think it matters, but "in array element order"
might be construed to prohibit parallelizing references to pure ones,
even though the restrictions on pure ones imply that the order can't
matter.