docs: use --dev vs -D for greater clarity (#540)

Author: Collbrothers

docs/content/en/guide/lint.md

@@ -21,14 +21,14 @@ If you're already using `@nuxtjs/eslint-config`, remove it from your dependencie
 <code-block label="Yarn" active>
 
 ```sh
-yarn add -D @nuxtjs/eslint-config-typescript
+yarn add --dev @nuxtjs/eslint-config-typescript
 ```
 
 </code-block>
 <code-block label="NPM">
 
 ```sh
-npm i -D @nuxtjs/eslint-config-typescript
+npm i --save-dev @nuxtjs/eslint-config-typescript
 ```
 
 </code-block>

docs/content/es/guide/lint.md

@@ -17,12 +17,23 @@ Si usted esta usando `@nuxtjs/eslint-config`, eliminelo de sus dependencias, la
 
 </alert>
 
+<code-group>
+<code-block label="Yarn" active>
+
+```sh
+yarn add --dev @nuxtjs/eslint-config-typescript
+```
+
+</code-block>
+<code-block label="NPM">
+
 ```sh
-npm i -D @nuxtjs/eslint-config-typescript
-# OR
-yarn add -D @nuxtjs/eslint-config-typescript
+npm i --save-dev @nuxtjs/eslint-config-typescript
 ```
 
+</code-block>
+</code-group>
+
 Luego, cree o edite su configuración de ESLint `.eslintrc.js` para que extienda de `@nuxtjs/eslint-config-typescript` :
 ```js
 module.exports = {

docs/content/ja/guide/lint.md

@@ -21,14 +21,14 @@ category: ガイド
 <code-block label="Yarn" active>
 
 ```sh
-yarn add -D @nuxtjs/eslint-config-typescript
+yarn add --dev @nuxtjs/eslint-config-typescript
 ```
 
 </code-block>
 <code-block label="NPM">
 
 ```sh
-npm i -D @nuxtjs/eslint-config-typescript
+npm i --save-dev @nuxtjs/eslint-config-typescript
 ```
 
 </code-block>

docs/content/pt/guide/lint.md

@@ -21,14 +21,14 @@ Se você já estiver usando `@nuxtjs/eslint-config`, o remova de suas dependênc
 <code-block label="Yarn" active>
 
 ```sh
-yarn add -D @nuxtjs/eslint-config-typescript
+yarn add --dev @nuxtjs/eslint-config-typescript
 ```
 
 </code-block>
 <code-block label="NPM">
 
 ```sh
-npm i -D @nuxtjs/eslint-config-typescript
+npm i --save-dev @nuxtjs/eslint-config-typescript
 ```
 
 </code-block>

docs/content/zh-Hans/guide/lint.md

@@ -21,14 +21,14 @@ category: 指南
 <code-block label="Yarn" active>
 
 ```sh
-yarn add -D @nuxtjs/eslint-config-typescript
+yarn add --dev @nuxtjs/eslint-config-typescript
 ```
 
 </code-block>
 <code-block label="NPM">
 
 ```sh
-npm i -D @nuxtjs/eslint-config-typescript
+npm i --save-dev @nuxtjs/eslint-config-typescript
 ```
 
 </code-block>

docs/content/zh-Hant/guide/lint.md

@@ -21,14 +21,14 @@ Nuxt TypeScript ESLint 的設定檔已經包含 `@nuxtjs/eslint-config`，如果
 <code-block label="Yarn" active>
 
 ```sh
-yarn add -D @nuxtjs/eslint-config-typescript
+yarn add --dev @nuxtjs/eslint-config-typescript
 ```
 
 </code-block>
 <code-block label="NPM">
 
 ```sh
-npm i -D @nuxtjs/eslint-config-typescript
+npm i --save-dev @nuxtjs/eslint-config-typescript
 ```
 
 </code-block>