Added Comments and assertions

src/compiler/types.ts

@@ -583,9 +583,9 @@ namespace ts {
      * Several node kinds share function-like features such as a signature,
      * a name, and a body. These nodes should extend FunctionLikeDeclaration.
      * Examples:
-     *  FunctionDeclaration
-     *  MethodDeclaration
-     *  AccessorDeclaration
+     * * FunctionDeclaration
+     * * MethodDeclaration
+     * * AccessorDeclaration
      */
     export interface FunctionLikeDeclaration extends SignatureDeclaration {
         _functionLikeDeclarationBrand: any;
@@ -1774,10 +1774,10 @@ namespace ts {
         StringLike = String | StringLiteral,
         NumberLike = Number | Enum,
         ObjectType = Class | Interface | Reference | Tuple | Anonymous,
-        UnionOrIntersection = Union | Intersection,
+        UnionOrIntersection = Union | Intersection,
         StructuredType = ObjectType | Union | Intersection,
         /* @internal */
-        RequiresWidening = ContainsUndefinedOrNull | ContainsObjectLiteral
+        RequiresWidening = ContainsUndefinedOrNull | ContainsObjectLiteral
     }
 
     // Properties common to all types