fix default value of param in jsdoc

docs/index.md

@@ -51,14 +51,14 @@ Return version of Wechaty
 
 | Param | Type | Default | Description |
 | --- | --- | --- | --- |
-| [forceNpm] | <code>boolean</code> | <code>false</code> | if set to true, will only return the version in package.json.                            otherwise will return git commit hash if .git exists. |
+| [forceNpm] | <code>boolean</code> | <code>false</code> | if set to true, will only return the version in package.json.                                    otherwise will return git commit hash if .git exists. |
 
 **Example**  
 ```js
 console.log(Wechaty.instance().version())
- // #git[af39df]
+ // '#git[af39df]'
  console.log(Wechaty.instance().version(true))
- // 0.7.9
+ // '0.7.9'
 ```
 <a name="Wechaty+user"></a>
 

src/wechaty.ts

@@ -3,12 +3,12 @@ import * as fs          from 'fs'
 import * as path        from 'path'
 
 import {
-    Config
-  , HeadName
-  , PuppetName
-  , Sayable
-  , log
-}                     from './config'
+  Config,
+  HeadName,
+  PuppetName,
+  Sayable,
+  log,
+}                         from './config'
 
 import { Contact }        from './contact'
 import { FriendRequest }  from './friend-request'
@@ -133,14 +133,14 @@ export class Wechaty extends EventEmitter implements Sayable {
 
   /**
    * Return version of Wechaty
-   * @param [forceNpm=false] {boolean} if set to true, will only return the version in package.json.
-   *                            otherwise will return git commit hash if .git exists.
+   * @param {boolean} [forceNpm=false]  if set to true, will only return the version in package.json.
+   *                                    otherwise will return git commit hash if .git exists.
    * @returns {string} version number
    * @example
    *  console.log(Wechaty.instance().version())
-   *  // #git[af39df]
+   *  // '#git[af39df]'
    *  console.log(Wechaty.instance().version(true))
-   *  // 0.7.9
+   *  // '0.7.9'
    */
   public version(forceNpm = false): string {
     // TODO: use  git rev-parse HEAD  ?