Fix error message wording when instanceof throws.

test/webkit/instance-of-immediates-expected.txt

Index: test/webkit/instance-of-immediates-expected.txt
diff --git a/test/webkit/instance-of-immediates-expected.txt b/test/webkit/instance-of-immediates-expected.txt
index a6f6cc50729aed25b29f9a3053acb31c4c1e4683..db58f00d304bece80b1691aaee65db77b744b89e 100644
--- a/test/webkit/instance-of-immediates-expected.txt
+++ b/test/webkit/instance-of-immediates-expected.txt
@@ -27,11 +27,11 @@ On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE
 
 
 PASS (1 instanceof 1) threw exception TypeError: Expecting a function in instanceof check, but got 1.
-PASS ({} instanceof 1) threw exception TypeError: Expecting a function in instanceof check, but got #<Object>.
-PASS (obj instanceof 1) threw exception TypeError: Expecting a function in instanceof check, but got #<Constructor>.
-PASS (1 instanceof {}) threw exception TypeError: Expecting a function in instanceof check, but got 1.
+PASS ({} instanceof 1) threw exception TypeError: Expecting a function in instanceof check, but got 1.
+PASS (obj instanceof 1) threw exception TypeError: Expecting a function in instanceof check, but got 1.
+PASS (1 instanceof {}) threw exception TypeError: Expecting a function in instanceof check, but got #<Object>.
 PASS ({} instanceof {}) threw exception TypeError: Expecting a function in instanceof check, but got #<Object>.
-PASS (obj instanceof {}) threw exception TypeError: Expecting a function in instanceof check, but got #<Constructor>.
+PASS (obj instanceof {}) threw exception TypeError: Expecting a function in instanceof check, but got #<Object>.
 PASS (1 instanceof Constructor) is false
 PASS ({} instanceof Constructor) is false
 PASS (obj instanceof Constructor) is true