add test case

tests/lang_callable/macros/tfor_ill_formed.nim

@@ -1,8 +1,19 @@
 discard """
-  cmd: "nim check --msgFormat=sexp --filenames=canonical --hints:off $options $file"
+  description: '''
+    Ensure that ill-formed for-statement AST is detected
+  '''
+  cmd: "nim check --hints:off $options $file"
   action: reject
-  nimoutFormat: sexp
+  nimout: '''
+tfor_ill_formed.nim(18, 16) Error: expression has no type: 
+if true:
+  discard
+else:
+  discard
+tfor_ill_formed.nim(18, 16) Error: iterator within for loop context expected
+tfor_ill_formed.nim(18, 1) Error: wrong number of variables
+'''
 """
-for i in (if true: discard else: discard): #[tt.Error
-        ^ (SemExpressionHasNoType) ]#
+
+for i, x, y in (if true: discard else: discard):
   discard