ownership: fix tests

Author: medvednikov

vlib/v/slow_tests/inout/os.out

@@ -1,5 +1,6 @@
 c_and_v_type_interoperability.md
 docs.md
+ownership.md
 packaging_v_for_distributions.md
 upcoming.md
 vscode.md

vlib/v2/types/checker_ownership_test.v

@@ -473,7 +473,7 @@ fn main() {
 "
 	exit_code, output := run_ownership_check(code)
 	assert exit_code != 0, 'should fail: s moved into struct field'
-	assert output.contains('use of moved value: `s`'), 'got: '
+	assert output.contains('use of moved value: `s`'), 'got: ${output}'
 }
 
 fn test_ownership_move_into_array_literal() {
@@ -486,7 +486,7 @@ fn main() {
 "
 	exit_code, output := run_ownership_check(code)
 	assert exit_code != 0, 'should fail: s moved into array literal'
-	assert output.contains('use of moved value: `s`'), 'got: '
+	assert output.contains('use of moved value: `s`'), 'got: ${output}'
 }
 
 fn test_ownership_move_into_array_append() {
@@ -500,7 +500,7 @@ fn main() {
 "
 	exit_code, output := run_ownership_check(code)
 	assert exit_code != 0, 'should fail: s moved into array append'
-	assert output.contains('use of moved value: `s`'), 'got: '
+	assert output.contains('use of moved value: `s`'), 'got: ${output}'
 }
 
 fn test_ownership_move_into_map_literal() {
@@ -513,5 +513,5 @@ fn main() {
 "
 	exit_code, output := run_ownership_check(code)
 	assert exit_code != 0, 'should fail: s moved into map literal'
-	assert output.contains('use of moved value: `s`'), 'got: '
+	assert output.contains('use of moved value: `s`'), 'got: ${output}'
 }