add warning in the splice() documentation that the function arguments are not modified; the return value contains a modified copy of the input value (SF #2506902)
add warning in the splice() documentation that the function arguments are not modified; the return value contains a modified copy of the input value (SF #2506902)

jrha/pan,quattor/pan,jrha/pan,jrha/pan,quattor/pan,jrha/pan,quattor/pan,jrha/pan,quattor/pan,quattor/pan