style: format index.html (#1713)

Author: thinkasany

index.html

@@ -5,11 +5,9 @@
   <meta charset="UTF-8">
   <title>LeetCode & Coding Interview Guide - Doocs Open Source Organization</title>
   <meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1" />
-  <meta name="keywords"
-    content="doc,docs,doocs,documentation,github,gitee,coding,pages,leetcode,lcof,lcci,lcof2,coding-interview,coding-interview-guide,cracking-the-coding-interview,yanglbme">
+  <meta name="keywords" content="doc,docs,doocs,documentation,github,gitee,coding,pages,leetcode,lcof,lcci,lcof2,coding-interview,coding-interview-guide,cracking-the-coding-interview,yanglbme">
   <meta name="description" content="LeetCode、剑指Offer、程序员面试金典题解">
-  <meta name="viewport"
-    content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0">
+  <meta name="viewport" content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0">
   <link rel="stylesheet" href="https://cdn-doocs.oss-cn-shenzhen.aliyuncs.com/npm/docsify@4.13.0/lib/themes/vue.css">
   <link rel="stylesheet" href="https://cdn-doocs.oss-cn-shenzhen.aliyuncs.com/npm/docsify-darklight-theme@latest/dist/style.min.css">
   <link rel="stylesheet" href="https://cdn-doocs.oss-cn-shenzhen.aliyuncs.com/npm/katex@latest/dist/katex.min.css">