all: fix remaining tests

Author: medvednikov

vlib/builtin/array.v

@@ -972,7 +972,7 @@ pub fn (a &array) sorted(callback fn (voidptr, voidptr) int) array
 // })
 // assert a == ['1', '3', '5', 'hi']
 // ```
-pub fn (mut a array) sort_with_compare(callback fn (voidptr, voidptr) int) {
+pub fn (mut a array) sort_with_compare(callback fn (const_a voidptr, const_b voidptr) int) {
 	$if freestanding {
 		panic('sort_with_compare does not work with -freestanding')
 	} $else {
@@ -983,7 +983,7 @@ pub fn (mut a array) sort_with_compare(callback fn (voidptr, voidptr) int) {
 // sorted_with_compare sorts a clone of the array. The original array is not modified.
 // It uses the results of the given function to determine sort order.
 // See also .sort_with_compare()
-pub fn (a &array) sorted_with_compare(callback fn (voidptr, voidptr) int) array {
+pub fn (a &array) sorted_with_compare(callback fn (const_a voidptr, const_b voidptr) int) array {
 	mut r := a.clone()
 	unsafe { vqsort(r.data, usize(r.len), usize(r.element_size), callback) }
 	return r

vlib/crypto/sha512/sha512block_generic.v

@@ -38,7 +38,7 @@ const _k = [
 fn block_generic(mut dig Digest, p_ []u8) {
 	unsafe {
 		mut p := p_
-		mut w := [80]u64{}
+		mut w := []u64{len: 80}
 		mut h0 := dig.h[0]
 		mut h1 := dig.h[1]
 		mut h2 := dig.h[2]

vlib/v/ast/scope.v

@@ -322,5 +322,5 @@ pub fn (mut sc Scope) mark_var_as_used(varname string) bool {
 }
 
 pub fn (sc &Scope) str() string {
-	return sc.show(0, 0)
+	return sc.show(0, 3)
 }