view v replace row count w   =>   view
v   input view
row   row position
count   row count
w   rows to be inserted

Replace takes an input view and returns one with count rows starting at row replaced by the contents of w. The views v and w must have the same structure.

Replace is used internally to implement {append}, {insert}, and {delete}.

Examples:
set v [view {A B} def {a b c d e f g h i j}]
set w [view {A B} def {x y xx yy}]

view $v replace 1 0 $w
AB
0ab
1xy
2xxyy
3cd
4ef
5gh
6ij
view $v replace 1 1 $w
AB
0ab
1xy
2xxyy
3ef
4gh
5ij
view $v replace 1 2 $w
AB
0ab
1xy
2xxyy
3gh
4ij
view $v replace 1 3 $w
AB
0ab
1xy
2xxyy
3ij