chore(v2): fix code style (revert previous changes)

packages/docusaurus-mdx-loader/src/index.js

@@ -19,7 +19,7 @@ const DEFAULT_OPTIONS = {
   remarkPlugins: [emoji, slug, rightToc],
 };
 
-module.exports = async function(fileString) {
+module.exports = async function (fileString) {
   const callback = this.async();
 
   const {data, content} = matter(fileString);

packages/docusaurus-mdx-loader/src/remark/rightToc/index.js

@@ -14,15 +14,15 @@ const parseOptions = {
   plugins: ['jsx'],
   sourceType: 'module',
 };
-const isImport = child => child.type === 'import';
-const hasImports = index => index > -1;
-const isExport = child => child.type === 'export';
+const isImport = (child) => child.type === 'import';
+const hasImports = (index) => index > -1;
+const isExport = (child) => child.type === 'export';
 
 const isTarget = (child, name) => {
   let found = false;
   const ast = parse(child.value, parseOptions);
   traverse(ast, {
-    VariableDeclarator: path => {
+    VariableDeclarator: (path) => {
       if (path.node.id.name === name) {
         found = true;
       }
@@ -61,7 +61,7 @@ const getOrCreateExistingTargetIndex = (children, name) => {
 const plugin = (options = {}) => {
   const name = options.name || 'rightToc';
 
-  const transformer = node => {
+  const transformer = (node) => {
     const headings = search(node);
     const {children} = node;
     const targetIndex = getOrCreateExistingTargetIndex(children, name);

packages/docusaurus-mdx-loader/src/remark/slug/__tests__/index.test.js

@@ -57,7 +57,7 @@ describe('slug plugin', () => {
 
   test('should not overwrite `data` on headings', () => {
     const result = process('# Normal\n', [
-      function() {
+      function () {
         function transform(tree) {
           tree.children[0].data = {foo: 'bar'};
         }
@@ -80,7 +80,7 @@ describe('slug plugin', () => {
 
   test('should not overwrite `data.hProperties` on headings', () => {
     const result = process('# Normal\n', [
-      function() {
+      function () {
         function transform(tree) {
           tree.children[0].data = {hProperties: {className: ['foo']}};
         }
@@ -110,7 +110,7 @@ describe('slug plugin', () => {
         '## Something also',
       ].join('\n\n'),
       [
-        function() {
+        function () {
           function transform(tree) {
             tree.children[1].data = {hProperties: {id: 'here'}};
             tree.children[3].data = {hProperties: {id: 'something'}};

packages/docusaurus-mdx-loader/src/remark/slug/index.js

@@ -12,7 +12,7 @@ const toString = require('mdast-util-to-string');
 const slugs = require('github-slugger')();
 
 function slug() {
-  const transformer = ast => {
+  const transformer = (ast) => {
     slugs.reset();
 
     function visitor(headingNode) {