chore: run Prettier on codebase

.eslintrc.yml

@@ -1,4 +1,4 @@
 root: true
 extends:
-  - plugin:@mysticatea/es2015
-  - plugin:@mysticatea/+eslint-plugin
+    - plugin:@mysticatea/es2015
+    - plugin:@mysticatea/+eslint-plugin

.github/FUNDING.yml

@@ -1,2 +1,2 @@
 github:
-- mysticatea
+    - mysticatea

.github/workflows/CI.yml

@@ -1,47 +1,47 @@
 name: CI
 on:
-  push:
-    branches: [master]
-  pull_request:
-    branches: [master]
-  schedule:
-    - cron: 0 0 * * 0
+    push:
+        branches: [master]
+    pull_request:
+        branches: [master]
+    schedule:
+        - cron: 0 0 * * 0
 
 jobs:
-  test:
-    name: Test
-    strategy:
-      matrix:
-        os: [ubuntu-latest]
-        eslint: [6]
-        node: [12.22.0, 12, 14.17.0, 14, 16, 18]
-        include:
-          # On other platforms
-          - os: windows-latest
-            node: 18
-          - os: macos-latest
-            node: 18
-          # On the minimum supported ESLint/Node.js version
-          - eslint: 6.6.0
-            node: 12.22.0
+    test:
+        name: Test
+        strategy:
+            matrix:
+                os: [ubuntu-latest]
+                eslint: [6]
+                node: [12.22.0, 12, 14.17.0, 14, 16, 18]
+                include:
+                    # On other platforms
+                    - os: windows-latest
+                      node: 18
+                    - os: macos-latest
+                      node: 18
+                    # On the minimum supported ESLint/Node.js version
+                    - eslint: 6.6.0
+                      node: 12.22.0
 
-    runs-on: ${{ matrix.os }}
-    steps:
-      - name: Checkout
-        uses: actions/checkout@v3
-      - name: Install Node.js ${{ matrix.node }}
-        uses: actions/setup-node@v3
-        with:
-          node-version: ${{ matrix.node }}
-      - name: Install Packages
-        run: npm install
-        env:
-          CI: true
-      - name: Install ESLint@${{  matrix.eslint  }}
-        run: npm install eslint@${{  matrix.eslint  }}
-      - name: Test
-        run: npm test
-      - name: Send Coverage
-        run: npm run -s codecov
-        env:
-          CODECOV_TOKEN: ${{ secrets.CODECOV_TOKEN }}
+        runs-on: ${{ matrix.os }}
+        steps:
+            - name: Checkout
+              uses: actions/checkout@v3
+            - name: Install Node.js ${{ matrix.node }}
+              uses: actions/setup-node@v3
+              with:
+                  node-version: ${{ matrix.node }}
+            - name: Install Packages
+              run: npm install
+              env:
+                  CI: true
+            - name: Install ESLint@${{  matrix.eslint  }}
+              run: npm install eslint@${{  matrix.eslint  }}
+            - name: Test
+              run: npm test
+            - name: Send Coverage
+              run: npm run -s codecov
+              env:
+                  CODECOV_TOKEN: ${{ secrets.CODECOV_TOKEN }}

.nycrc.yml

@@ -1,7 +1,7 @@
 include:
-- lib
+    - lib
 exclude:
-- lib/processors/vue.js
+    - lib/processors/vue.js
 reporter:
-- text-summary
-- lcov
+    - text-summary
+    - lcov

.prettierrc.js

@@ -0,0 +1,5 @@
+module.exports = {
+    tabWidth: 4,
+    semi: false,
+    trailingComma: "es5",
+}

README.md

@@ -16,40 +16,40 @@ npm install --save-dev eslint @mysticatea/eslint-plugin
 
 ### Requirements
 
-- Node.js `^12.22.0 || ^14.17.0 || >=16.0.0` or newer versions.
-- ESLint `^6.6.0` or newer versions.
+-   Node.js `^12.22.0 || ^14.17.0 || >=16.0.0` or newer versions.
+-   ESLint `^6.6.0` or newer versions.
 
 ## 📖 Usage
 
 Write in your ESLint configurations: http://eslint.org/docs/user-guide/configuring#using-the-configuration-from-a-plugin
 
 ### Configs
 
-- `plugin:@mysticatea/es2020` ... Basic configuration for ES2020.
-- `plugin:@mysticatea/es2019` ... Basic configuration for ES2019.
-- `plugin:@mysticatea/es2018` ... Basic configuration for ES2018.
-- `plugin:@mysticatea/es2017` ... Basic configuration for ES2017.
-- `plugin:@mysticatea/es2016` ... Basic configuration for ES2016.
-- `plugin:@mysticatea/es2015` ... Basic configuration for ES2015.
-- `plugin:@mysticatea/es5` ... Basic configuration for ES5.
-- `plugin:@mysticatea/+modules` ... Additional configuration for ES modules.
-- `plugin:@mysticatea/+browser` ... Additional configuration for browser environment.
-- `plugin:@mysticatea/+node` ... Additional configuration for Node.js environment.
-- `plugin:@mysticatea/+eslint-plugin` ... Additional configuration for ESLint plugins. This includes `plugin:mysticatea/+node` setting.
+-   `plugin:@mysticatea/es2020` ... Basic configuration for ES2020.
+-   `plugin:@mysticatea/es2019` ... Basic configuration for ES2019.
+-   `plugin:@mysticatea/es2018` ... Basic configuration for ES2018.
+-   `plugin:@mysticatea/es2017` ... Basic configuration for ES2017.
+-   `plugin:@mysticatea/es2016` ... Basic configuration for ES2016.
+-   `plugin:@mysticatea/es2015` ... Basic configuration for ES2015.
+-   `plugin:@mysticatea/es5` ... Basic configuration for ES5.
+-   `plugin:@mysticatea/+modules` ... Additional configuration for ES modules.
+-   `plugin:@mysticatea/+browser` ... Additional configuration for browser environment.
+-   `plugin:@mysticatea/+node` ... Additional configuration for Node.js environment.
+-   `plugin:@mysticatea/+eslint-plugin` ... Additional configuration for ESLint plugins. This includes `plugin:mysticatea/+node` setting.
 
 #### Details
 
 The main configurations `plugin:@mysticatea/es*` does:
 
-- detect bug-like code by ESLint rules.
-- enforce whitespace style by Prettier.
-- handle the `.ts` files as TypeScript then check by `typescript-eslint-parser` and `eslint-plugin-typescript`.
-- handle the `.vue` files as Vue.js SFC then check by `vue-eslint-parser` and `eslint-plugin-vue`.
-- handle the files in `test`/`tests` directory as `mocha`'s test code.
-- handle the files in `scripts` directory as Node.js environment.
-- handle the `.eslintrc.js` file as a Node.js script.
-- handle the `webpack.config.js` file as a Node.js script.
-- handle the `rollup.config.js` file as an ES module.
+-   detect bug-like code by ESLint rules.
+-   enforce whitespace style by Prettier.
+-   handle the `.ts` files as TypeScript then check by `typescript-eslint-parser` and `eslint-plugin-typescript`.
+-   handle the `.vue` files as Vue.js SFC then check by `vue-eslint-parser` and `eslint-plugin-vue`.
+-   handle the files in `test`/`tests` directory as `mocha`'s test code.
+-   handle the files in `scripts` directory as Node.js environment.
+-   handle the `.eslintrc.js` file as a Node.js script.
+-   handle the `webpack.config.js` file as a Node.js script.
+-   handle the `rollup.config.js` file as an ES module.
 
 You can use combination of a main configuration and some additional configurations.
 For examples:
@@ -58,10 +58,7 @@ For examples:
 
 ```json
 {
-    "extends": [
-        "plugin:@mysticatea/es2015",
-        "plugin:@mysticatea/+node"
-    ]
+    "extends": ["plugin:@mysticatea/es2015", "plugin:@mysticatea/+node"]
 }
 ```
 
@@ -71,10 +68,7 @@ For examples:
 
 ```json
 {
-    "extends": [
-        "plugin:@mysticatea/es2015",
-        "plugin:@mysticatea/+browser"
-    ]
+    "extends": ["plugin:@mysticatea/es2015", "plugin:@mysticatea/+browser"]
 }
 ```
 
@@ -107,26 +101,26 @@ This plugin has some original rules and foreign rules.
 
 #### Original rules
 
-- [@mysticatea/arrow-parens](docs/rules/arrow-parens.md) enforces parens of argument lists (excludes too redundant parens) (fixable).
-- [@mysticatea/block-scoped-var](docs/rules/block-scoped-var.md) handles variables which are declared by `var` declaration as block-scoped. It disallows redeclarations, uses from outside of the scope, shadowing.
-- [@mysticatea/no-instanceof-array](docs/rules/no-instanceof-array.md) disallows 'instanceof' for Array (fixable).
-- [@mysticatea/no-instanceof-wrapper](docs/rules/no-instanceof-wrapper.md) disallows 'instanceof' for wrapper objects (fixable).
-- [@mysticatea/no-literal-call](docs/rules/no-literal-call.md) disallows a call of a literal.
-- [@mysticatea/no-this-in-static](docs/rules/no-this-in-static.md) disallows `this`/`super` in static methods.
-- [@mysticatea/no-use-ignored-vars](docs/rules/no-use-ignored-vars.md) disallows a use of ignored variables.
-- [@mysticatea/no-useless-rest-spread](docs/rules/no-useless-rest-spread.md) disallows unnecessary rest/spread operators (fixable).
-- [@mysticatea/prefer-for-of](docs/rules/prefer-for-of.md) requires `for-of` statements instead of `Array#forEach` or something like (fixable).
+-   [@mysticatea/arrow-parens](docs/rules/arrow-parens.md) enforces parens of argument lists (excludes too redundant parens) (fixable).
+-   [@mysticatea/block-scoped-var](docs/rules/block-scoped-var.md) handles variables which are declared by `var` declaration as block-scoped. It disallows redeclarations, uses from outside of the scope, shadowing.
+-   [@mysticatea/no-instanceof-array](docs/rules/no-instanceof-array.md) disallows 'instanceof' for Array (fixable).
+-   [@mysticatea/no-instanceof-wrapper](docs/rules/no-instanceof-wrapper.md) disallows 'instanceof' for wrapper objects (fixable).
+-   [@mysticatea/no-literal-call](docs/rules/no-literal-call.md) disallows a call of a literal.
+-   [@mysticatea/no-this-in-static](docs/rules/no-this-in-static.md) disallows `this`/`super` in static methods.
+-   [@mysticatea/no-use-ignored-vars](docs/rules/no-use-ignored-vars.md) disallows a use of ignored variables.
+-   [@mysticatea/no-useless-rest-spread](docs/rules/no-useless-rest-spread.md) disallows unnecessary rest/spread operators (fixable).
+-   [@mysticatea/prefer-for-of](docs/rules/prefer-for-of.md) requires `for-of` statements instead of `Array#forEach` or something like (fixable).
 
 #### Foreign rules
 
-- All `@mysticatea/eslint-comments/*` rules are imported from [eslint-plugin-eslint-comments](https://www.npmjs.com/package/eslint-plugin-eslint-comments).
-- All `@mysticatea/eslint-plugin/*` rules are imported from [eslint-plugin-eslint-plugin](https://www.npmjs.com/package/eslint-plugin-eslint-plugin).
-- All `@mysticatea/node/*` rules are imported from [eslint-plugin-node](https://www.npmjs.com/package/eslint-plugin-node).
-- All `@mysticatea/ts/*` rules are imported from [eslint-plugin-typescript](https://www.npmjs.com/package/eslint-plugin-typescript).
-- All `@mysticatea/vue/*` rules are imported from [eslint-plugin-vue](https://www.npmjs.com/package/eslint-plugin-vue).
-- The `@mysticatea/prettier` rule is imported from [eslint-plugin-prettier](https://www.npmjs.com/package/eslint-plugin-prettier).
+-   All `@mysticatea/eslint-comments/*` rules are imported from [eslint-plugin-eslint-comments](https://www.npmjs.com/package/eslint-plugin-eslint-comments).
+-   All `@mysticatea/eslint-plugin/*` rules are imported from [eslint-plugin-eslint-plugin](https://www.npmjs.com/package/eslint-plugin-eslint-plugin).
+-   All `@mysticatea/node/*` rules are imported from [eslint-plugin-node](https://www.npmjs.com/package/eslint-plugin-node).
+-   All `@mysticatea/ts/*` rules are imported from [eslint-plugin-typescript](https://www.npmjs.com/package/eslint-plugin-typescript).
+-   All `@mysticatea/vue/*` rules are imported from [eslint-plugin-vue](https://www.npmjs.com/package/eslint-plugin-vue).
+-   The `@mysticatea/prettier` rule is imported from [eslint-plugin-prettier](https://www.npmjs.com/package/eslint-plugin-prettier).
 
-> **Q:** Why don't you use those plugins directly?<br>
+> **Q:** Why don't you use those plugins directly?  
 > **A:** The combination with shareable configs and plugins has some problems because shareable configs were not designed to be used with plugins. @nzakas illustrated a way to use plugins as shareable configs together with other plugins in the discussion [eslint/eslint#3458](https://github.com/eslint/eslint/issues/3458#issuecomment-257161846). This is the way.
 
 ## 🚥 Semantic Versioning Policy
@@ -135,7 +129,7 @@ This plugin follows [semantic versioning](http://semver.org/) and [ESLint's Sema
 
 ## 📰 Changelog
 
-- [GitHub Releases](https://github.com/mysticatea/eslint-plugin/releases)
+-   [GitHub Releases](https://github.com/mysticatea/eslint-plugin/releases)
 
 ## ❤️ Contributing
 
@@ -145,8 +139,8 @@ Please use GitHub's Issues/PRs.
 
 ### Development Tools
 
-- `npm test` runs tests and measures coverage.
-- `npm run clean` removes the coverage result of `npm test` command.
-- `npm run coverage` shows the coverage result of `npm test` command.
-- `npm run update` updates auto-generated files.
-- `npm run watch` runs tests and measures coverage when source code are changed.
+-   `npm test` runs tests and measures coverage.
+-   `npm run clean` removes the coverage result of `npm test` command.
+-   `npm run coverage` shows the coverage result of `npm test` command.
+-   `npm run update` updates auto-generated files.
+-   `npm run watch` runs tests and measures coverage when source code are changed.

docs/rules/arrow-parens.md

@@ -12,39 +12,45 @@ This rule ignores arrow functions that there is a open paren before itself.
 ### The following patterns are considered warnings:
 
 ```js
-const twice = x => 2 * x;
+const twice = (x) => 2 * x
 ```
 
 ```js
 const obj = {
-  twich: x => 2 * x
-};
+    twich: (x) => 2 * x,
+}
 ```
 
 ```js
-p.then(x => 2 * x, err => console.error(err));
+p.then(
+    (x) => 2 * x,
+    (err) => console.error(err)
+)
 ```
 
 ### The following patterns are not considered warnings:
 
 ```js
-const twice = (x) => 2 * x;
-const twice = (x => 2 * x);
+const twice = (x) => 2 * x
+const twice = (x) => 2 * x
 ```
 
 ```js
 const obj = {
-  twich: (x) => 2 * x
-};
+    twich: (x) => 2 * x,
+}
 const obj2 = {
-  twich: (x => 2 * x)
-};
+    twich: (x) => 2 * x,
+}
 ```
 
 ```js
-xs.map(x => 2 * x);
+xs.map((x) => 2 * x)
 ```
 
 ```js
-p.then(x => 2 * x, (err) => console.error(err));
+p.then(
+    (x) => 2 * x,
+    (err) => console.error(err)
+)
 ```