🧑‍🔬 Fixed simple error-code tests

We now return two instead of one

Author: JoaquimEsteves

test-data/unit/check-errorcodes.test

@@ -455,7 +455,7 @@ class E(TypedDict):
     y: int
 
 a: D = {'x': ''}  # E: Incompatible types (expression has type "str", TypedDict item "x" has type "int")  [typeddict-item]
-b: D = {'y': ''}  # E: Extra key "y" for TypedDict "D"  [typeddict-item]
+b: D = {'y': ''}  # E: Missing key "x" for TypedDict "D"  [typeddict-item] # E: Extra key "y" for TypedDict "D"  [typeddict-unknown-item]
 c = D(x=0) if int() else E(x=0, y=0)
 c = {}  # E: Expected TypedDict key "x" but found no keys  [typeddict-item]
 

test-data/unit/check-typeddict.test

@@ -2020,7 +2020,7 @@ v = {union: 2} # E: Expected TypedDict key to be string literal
 num2: Literal['num']
 v = {num2: 2}
 bad2: Literal['bad']
-v = {bad2: 2}  # E: Extra key "bad" for TypedDict "Value"
+v = {bad2: 2}  # E: Missing key "num" for TypedDict "Value" # E: Extra key "bad" for TypedDict "Value"
 
 [builtins fixtures/dict.pyi]
 [typing fixtures/typing-typeddict.pyi]