Adding comment

src/compiler/emitter.ts

@@ -2291,6 +2291,8 @@ module ts {
                     case SyntaxKind.ElementAccessExpression:
                     case SyntaxKind.CallExpression:
                     case SyntaxKind.ParenthesizedExpression:
+                        // This list is not exhaustive and only includes those cases that are relevant
+                        // to the check in emitArrayLiteral. More cases can be added as needed.
                         return false;
                 }
                 return true;