Add a test

tests/cases/fourslash/syntacticClassificationsForOfKeyword.ts

@@ -0,0 +1,16 @@
+/// <reference path="fourslash.ts"/>
+
+//// for (var of of of) { }
+
+var c = classification;
+verify.syntacticClassificationsAre(
+    c.keyword("for"),
+    c.punctuation("("),
+    c.keyword("var"),
+    c.text("of"),
+    c.keyword("of"),
+    c.text("of"),
+    c.punctuation(")"),
+    c.punctuation("{"),
+    c.punctuation("}")
+    );