Emit widened literal type for const without type annotation

src/compiler/checker.ts

@@ -18950,7 +18950,7 @@ namespace ts {
             // Get type of the symbol if this is the valid symbol otherwise get type at location
             const symbol = getSymbolOfNode(declaration);
             const type = symbol && !(symbol.flags & (SymbolFlags.TypeLiteral | SymbolFlags.Signature))
-                ? getTypeOfSymbol(symbol)
+                ? getWidenedLiteralType(getTypeOfSymbol(symbol))
                 : unknownType;
 
             getSymbolDisplayBuilder().buildTypeDisplay(type, writer, enclosingDeclaration, flags);