Error in module-plugin.d.ts template

TypeScript Version: 3.4.5

Search Terms: module-plugin.d.ts template Module Plugin or UMD Plugin Cannot augment module 'jquery' because it resolves to a non-module entity.

Code

// This is a copy from https://www.typescriptlang.org/docs/handbook/declaration-files/templates/module-plugin-d-ts.html
// Put this file in node_modules/@types/jquery-plugin/index.d.ts
// will get an error:
// Cannot augment module 'jquery' because it resolves to a non-module entity.



// Type definitions for [~THE LIBRARY NAME~] [~OPTIONAL VERSION NUMBER~]
// Project: [~THE PROJECT NAME~]
// Definitions by: [~YOUR NAME~] <[~A URL FOR YOU~]>

/*~ This is the module plugin template file. You should rename it to index.d.ts
 *~ and place it in a folder with the same name as the module.
 *~ For example, if you were writing a file for "super-greeter", this
 *~ file should be 'super-greeter/index.d.ts'
 */

/*~ On this line, import the module which this module adds to */
import * as m from 'jquery';

/*~ Here, declare the same module as the one you imported above */
declare module 'jquery' {
    /*~ Inside, add new function, classes, or variables. You can use
     *~ unexported types from the original module if needed. */
    export function theNewMethod(): string;

    /*~ You can also add new properties to existing interfaces from
     *~ the original module by writing interface augmentations */
    export interface SomeModuleOptions {
        someModuleSetting?: string;
    }

    /*~ New types can also be declared and will appear as if they
     *~ are in the original module */
    export interface MyModulePluginOptions {
        size: number;
    }
}

Expected behavior: No errors and have code hint for this plugin

Actual behavior: Have errors

Playground Link:

Related Issues:

Start from the module-plugin.d.ts template linked in the issue and reproduce the shown example with TypeScript 3.4.5 and jquery. Check the handbook source containing that template, then verify that the corrected example produces no module-augmentation error and still provides plugin code hints.