Report out-of-bounds errors more precisely for array.fill_range/5.
library/array.m:
As above.
NEWS:
Announce the addition.
tests/hard_coded/Mmakefile:
tests/hard_coded/array_swap.{m,exp}:
Add a test for array.swap/4.
tests/hard_coded/array_fill.exp:
Conform to the second change above.
